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Influenza - Simple English Wikipedia, the free encyclopedia

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class="vector-toc-numb">2.1</span> <span>Changes in the influenza virus</span> </div> </a> <ul id="toc-Changes_in_the_influenza_virus-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Swine_flu_(March/April_2009)" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Swine_flu_(March/April_2009)"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Swine flu (March/April 2009)</span> </div> </a> <ul id="toc-Swine_flu_(March/April_2009)-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Other_websites" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Other_websites"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Other websites</span> </div> </a> <ul id="toc-Other_websites-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Influenza</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 145 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-145" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">145 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Griep" title="Griep – Afrikaans" lang="af" hreflang="af" data-title="Griep" data-language-autonym="Afrikaans" data-language-local-name="Afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-als mw-list-item"><a href="https://als.wikipedia.org/wiki/Influenza" title="Influenza – Alemannic" lang="gsw" hreflang="gsw" data-title="Influenza" data-language-autonym="Alemannisch" data-language-local-name="Alemannic" class="interlanguage-link-target"><span>Alemannisch</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%A5%D9%86%D9%81%D9%84%D9%88%D9%86%D8%B2%D8%A7" title="إنفلونزا – Arabic" lang="ar" hreflang="ar" data-title="إنفلونزا" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Gripe" title="Gripe – Aragonese" lang="an" hreflang="an" data-title="Gripe" data-language-autonym="Aragonés" data-language-local-name="Aragonese" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-roa-rup mw-list-item"><a href="https://roa-rup.wikipedia.org/wiki/Aremi" title="Aremi – Aromanian" lang="rup" hreflang="rup" data-title="Aremi" data-language-autonym="Armãneashti" data-language-local-name="Aromanian" class="interlanguage-link-target"><span>Armãneashti</span></a></li><li class="interlanguage-link interwiki-frp mw-list-item"><a href="https://frp.wikipedia.org/wiki/Gripa" title="Gripa – Arpitan" lang="frp" hreflang="frp" data-title="Gripa" data-language-autonym="Arpetan" data-language-local-name="Arpitan" class="interlanguage-link-target"><span>Arpetan</span></a></li><li class="interlanguage-link interwiki-as mw-list-item"><a href="https://as.wikipedia.org/wiki/%E0%A6%87%E0%A6%A8%E0%A6%AB%E0%A7%8D%E0%A6%B2%E0%A7%81%E0%A7%B1%E0%A7%87%E0%A6%9E%E0%A7%8D%E0%A6%9C%E0%A6%BE" title="ইনফ্লুৱেঞ্জা – Assamese" lang="as" hreflang="as" data-title="ইনফ্লুৱেঞ্জা" data-language-autonym="অসমীয়া" data-language-local-name="Assamese" class="interlanguage-link-target"><span>অসমীয়া</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Gripe" title="Gripe – Asturian" lang="ast" hreflang="ast" data-title="Gripe" data-language-autonym="Asturianu" data-language-local-name="Asturian" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-awa mw-list-item"><a href="https://awa.wikipedia.org/wiki/%E0%A4%87%E0%A4%A8%E0%A4%AB%E0%A4%BC%E0%A5%8D%E0%A4%B2%E0%A5%81%E0%A4%8F%E0%A4%82%E0%A4%9C%E0%A4%BC%E0%A4%BE" title="इनफ़्लुएंज़ा – Awadhi" lang="awa" hreflang="awa" data-title="इनफ़्लुएंज़ा" data-language-autonym="अवधी" data-language-local-name="Awadhi" class="interlanguage-link-target"><span>अवधी</span></a></li><li class="interlanguage-link interwiki-gn mw-list-item"><a href="https://gn.wikipedia.org/wiki/Mba%27asyparar%C3%A3" title="Mba&#039;asypararã – Guarani" lang="gn" hreflang="gn" data-title="Mba&#039;asypararã" data-language-autonym="Avañe&#039;ẽ" data-language-local-name="Guarani" class="interlanguage-link-target"><span>Avañe'ẽ</span></a></li><li class="interlanguage-link interwiki-ay mw-list-item"><a href="https://ay.wikipedia.org/wiki/Jurma_usu" title="Jurma usu – Aymara" lang="ay" hreflang="ay" data-title="Jurma usu" data-language-autonym="Aymar aru" data-language-local-name="Aymara" class="interlanguage-link-target"><span>Aymar aru</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Qrip" title="Qrip – Azerbaijani" lang="az" hreflang="az" data-title="Qrip" data-language-autonym="Azərbaycanca" data-language-local-name="Azerbaijani" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%D8%A2%D9%86%D9%81%D9%88%D9%84%D8%A7%D9%86%D8%B2%D8%A7" title="آنفولانزا – South Azerbaijani" lang="azb" hreflang="azb" data-title="آنفولانزا" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%87%E0%A6%A8%E0%A6%AB%E0%A7%8D%E0%A6%B2%E0%A7%81%E0%A6%AF%E0%A6%BC%E0%A7%87%E0%A6%9E%E0%A7%8D%E0%A6%9C%E0%A6%BE" title="ইনফ্লুয়েঞ্জা – Bangla" lang="bn" hreflang="bn" data-title="ইনফ্লুয়েঞ্জা" data-language-autonym="বাংলা" data-language-local-name="Bangla" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Li%C3%BB-h%C3%AAng-s%C3%A8ng_k%C3%A1m-m%C5%8D%CD%98" title="Liû-hêng-sèng kám-mō͘ – Minnan" lang="nan" hreflang="nan" data-title="Liû-hêng-sèng kám-mō͘" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="Minnan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-map-bms mw-list-item"><a href="https://map-bms.wikipedia.org/wiki/Influenza" title="Influenza – Banyumasan" lang="jv-x-bms" hreflang="jv-x-bms" data-title="Influenza" data-language-autonym="Basa Banyumasan" data-language-local-name="Banyumasan" class="interlanguage-link-target"><span>Basa Banyumasan</span></a></li><li class="interlanguage-link interwiki-ba mw-list-item"><a href="https://ba.wikipedia.org/wiki/%D0%93%D1%80%D0%B8%D0%BF%D0%BF" title="Грипп – Bashkir" lang="ba" hreflang="ba" data-title="Грипп" data-language-autonym="Башҡортса" data-language-local-name="Bashkir" class="interlanguage-link-target"><span>Башҡортса</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%93%D1%80%D1%8B%D0%BF" title="Грып – Belarusian" lang="be" hreflang="be" data-title="Грып" data-language-autonym="Беларуская" data-language-local-name="Belarusian" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%93%D1%80%D1%8B%D0%BF" title="Грып – Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Грып" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%93%D1%80%D0%B8%D0%BF" title="Грип – Bulgarian" lang="bg" hreflang="bg" data-title="Грип" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bo mw-list-item"><a href="https://bo.wikipedia.org/wiki/%E0%BD%9A%E0%BD%91%E0%BC%8B%E0%BD%A2%E0%BD%B2%E0%BD%98%E0%BD%A6%E0%BC%8D" title="ཚད་རིམས། – Tibetan" lang="bo" hreflang="bo" data-title="ཚད་རིམས།" data-language-autonym="བོད་ཡིག" data-language-local-name="Tibetan" class="interlanguage-link-target"><span>བོད་ཡིག</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Gripa" title="Gripa – Bosnian" lang="bs" hreflang="bs" data-title="Gripa" data-language-autonym="Bosanski" data-language-local-name="Bosnian" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-br mw-list-item"><a href="https://br.wikipedia.org/wiki/Grip" title="Grip – Breton" lang="br" hreflang="br" data-title="Grip" data-language-autonym="Brezhoneg" data-language-local-name="Breton" class="interlanguage-link-target"><span>Brezhoneg</span></a></li><li class="interlanguage-link interwiki-bxr mw-list-item"><a href="https://bxr.wikipedia.org/wiki/%D0%A5%D1%8D%D0%B6%D1%8D%D0%B3" title="Хэжэг – Russia Buriat" lang="bxr" hreflang="bxr" data-title="Хэжэг" data-language-autonym="Буряад" data-language-local-name="Russia Buriat" class="interlanguage-link-target"><span>Буряад</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Grip" title="Grip – Catalan" lang="ca" hreflang="ca" data-title="Grip" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Ch%C5%99ipka" title="Chřipka – Czech" lang="cs" hreflang="cs" data-title="Chřipka" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Y_ffliw" title="Y ffliw – Welsh" lang="cy" hreflang="cy" data-title="Y ffliw" data-language-autonym="Cymraeg" data-language-local-name="Welsh" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Influenza" title="Influenza – Danish" lang="da" hreflang="da" data-title="Influenza" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Influenza" title="Influenza – German" lang="de" hreflang="de" data-title="Influenza" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-dv mw-list-item"><a href="https://dv.wikipedia.org/wiki/%DE%87%DE%A8%DE%82%DE%B0%DE%8A%DE%AA%DE%8D%DE%AA%DE%87%DE%AC%DE%82%DE%B0%DE%92%DE%A7" title="އިންފުލުއެންޒާ – Divehi" lang="dv" hreflang="dv" data-title="އިންފުލުއެންޒާ" data-language-autonym="ދިވެހިބަސް" data-language-local-name="Divehi" class="interlanguage-link-target"><span>ދިވެހިބަސް</span></a></li><li class="interlanguage-link interwiki-nv mw-list-item"><a href="https://nv.wikipedia.org/wiki/Tahoniig%C3%A1%C3%A1h" title="Tahoniigááh – Navajo" lang="nv" hreflang="nv" data-title="Tahoniigááh" data-language-autonym="Diné bizaad" data-language-local-name="Navajo" class="interlanguage-link-target"><span>Diné bizaad</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Gripp" title="Gripp – Estonian" lang="et" hreflang="et" data-title="Gripp" data-language-autonym="Eesti" data-language-local-name="Estonian" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%93%CF%81%CE%AF%CF%80%CE%B7" title="Γρίπη – Greek" lang="el" hreflang="el" data-title="Γρίπη" data-language-autonym="Ελληνικά" data-language-local-name="Greek" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en badge-Q17437796 badge-featuredarticle mw-list-item" title="featured article badge"><a href="https://en.wikipedia.org/wiki/Influenza" title="Influenza – English" lang="en" hreflang="en" data-title="Influenza" data-language-autonym="English" data-language-local-name="English" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es badge-Q17437796 badge-featuredarticle mw-list-item" title="featured article badge"><a href="https://es.wikipedia.org/wiki/Gripe" title="Gripe – Spanish" lang="es" hreflang="es" data-title="Gripe" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Gripo" title="Gripo – Esperanto" lang="eo" hreflang="eo" data-title="Gripo" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Gripe" title="Gripe – Basque" lang="eu" hreflang="eu" data-title="Gripe" data-language-autonym="Euskara" data-language-local-name="Basque" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%A2%D9%86%D9%81%D9%84%D9%88%D8%A7%D9%86%D8%B2%D8%A7" title="آنفلوانزا – Persian" lang="fa" hreflang="fa" data-title="آنفلوانزا" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-hif mw-list-item"><a href="https://hif.wikipedia.org/wiki/Bukhaar" title="Bukhaar – Fiji Hindi" lang="hif" hreflang="hif" data-title="Bukhaar" data-language-autonym="Fiji Hindi" data-language-local-name="Fiji Hindi" class="interlanguage-link-target"><span>Fiji Hindi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Grippe" title="Grippe – French" lang="fr" hreflang="fr" data-title="Grippe" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-fy mw-list-item"><a href="https://fy.wikipedia.org/wiki/Gryp" title="Gryp – Western Frisian" lang="fy" hreflang="fy" data-title="Gryp" data-language-autonym="Frysk" data-language-local-name="Western Frisian" class="interlanguage-link-target"><span>Frysk</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Fli%C3%BA" title="Fliú – Irish" lang="ga" hreflang="ga" data-title="Fliú" data-language-autonym="Gaeilge" data-language-local-name="Irish" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gd mw-list-item"><a href="https://gd.wikipedia.org/wiki/An_cnatan-m%C3%B2r" title="An cnatan-mòr – Scottish Gaelic" lang="gd" hreflang="gd" data-title="An cnatan-mòr" data-language-autonym="Gàidhlig" data-language-local-name="Scottish Gaelic" class="interlanguage-link-target"><span>Gàidhlig</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Gripe" title="Gripe – Galician" lang="gl" hreflang="gl" data-title="Gripe" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-hak mw-list-item"><a href="https://hak.wikipedia.org/wiki/Li%C3%B9-h%C3%A0ng-sin_k%C3%A1m-mo" title="Liù-hàng-sin kám-mo – Hakka Chinese" lang="hak" hreflang="hak" data-title="Liù-hàng-sin kám-mo" data-language-autonym="客家語 / Hak-kâ-ngî" data-language-local-name="Hakka Chinese" class="interlanguage-link-target"><span>客家語 / Hak-kâ-ngî</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%9D%B8%ED%94%8C%EB%A3%A8%EC%97%94%EC%9E%90" title="인플루엔자 – Korean" lang="ko" hreflang="ko" data-title="인플루엔자" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ha mw-list-item"><a href="https://ha.wikipedia.org/wiki/Influenza" title="Influenza – Hausa" lang="ha" hreflang="ha" data-title="Influenza" data-language-autonym="Hausa" data-language-local-name="Hausa" class="interlanguage-link-target"><span>Hausa</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D4%B3%D6%80%D5%AB%D5%BA" title="Գրիպ – Armenian" lang="hy" hreflang="hy" data-title="Գրիպ" data-language-autonym="Հայերեն" data-language-local-name="Armenian" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%87%E0%A4%A8%E0%A4%AB%E0%A4%BC%E0%A5%8D%E0%A4%B2%E0%A5%81%E0%A4%8F%E0%A4%82%E0%A4%9C%E0%A4%BC%E0%A4%BE" title="इनफ़्लुएंज़ा – Hindi" lang="hi" hreflang="hi" data-title="इनफ़्लुएंज़ा" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Gripa" title="Gripa – Croatian" lang="hr" hreflang="hr" data-title="Gripa" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Influenzo" title="Influenzo – Ido" lang="io" hreflang="io" data-title="Influenzo" data-language-autonym="Ido" data-language-local-name="Ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-ilo mw-list-item"><a href="https://ilo.wikipedia.org/wiki/Trangkaso" title="Trangkaso – Iloko" lang="ilo" hreflang="ilo" data-title="Trangkaso" data-language-autonym="Ilokano" data-language-local-name="Iloko" class="interlanguage-link-target"><span>Ilokano</span></a></li><li class="interlanguage-link interwiki-id badge-Q17437798 badge-goodarticle mw-list-item" title="good article badge"><a href="https://id.wikipedia.org/wiki/Influenza" title="Influenza – Indonesian" lang="id" hreflang="id" data-title="Influenza" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/Influenza" title="Influenza – Interlingua" lang="ia" hreflang="ia" data-title="Influenza" data-language-autonym="Interlingua" data-language-local-name="Interlingua" class="interlanguage-link-target"><span>Interlingua</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Infl%C3%BAensa" title="Inflúensa – Icelandic" lang="is" hreflang="is" data-title="Inflúensa" data-language-autonym="Íslenska" data-language-local-name="Icelandic" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Influenza" title="Influenza – Italian" lang="it" hreflang="it" data-title="Influenza" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A9%D7%A4%D7%A2%D7%AA" title="שפעת – Hebrew" lang="he" hreflang="he" data-title="שפעת" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-jv badge-Q17437796 badge-featuredarticle mw-list-item" title="featured article badge"><a href="https://jv.wikipedia.org/wiki/Influenza" title="Influenza – Javanese" lang="jv" hreflang="jv" data-title="Influenza" data-language-autonym="Jawa" data-language-local-name="Javanese" class="interlanguage-link-target"><span>Jawa</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/%E0%B2%87%E0%B2%A8%E0%B3%8D%E0%B2%AB%E0%B3%8D%E0%B2%B2%E0%B3%81%E0%B2%AF%E0%B3%86%E0%B2%A8%E0%B3%8D%E0%B2%9C" title="ಇನ್ಫ್ಲುಯೆನ್ಜ – Kannada" lang="kn" hreflang="kn" data-title="ಇನ್ಫ್ಲುಯೆನ್ಜ" data-language-autonym="ಕನ್ನಡ" data-language-local-name="Kannada" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%92%E1%83%A0%E1%83%98%E1%83%9E%E1%83%98" title="გრიპი – Georgian" lang="ka" hreflang="ka" data-title="გრიპი" data-language-autonym="ქართული" data-language-local-name="Georgian" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-csb mw-list-item"><a href="https://csb.wikipedia.org/wiki/Gripa" title="Gripa – Kashubian" lang="csb" hreflang="csb" data-title="Gripa" data-language-autonym="Kaszëbsczi" data-language-local-name="Kashubian" class="interlanguage-link-target"><span>Kaszëbsczi</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%A2%D2%B1%D0%BC%D0%B0%D1%83" title="Тұмау – Kazakh" lang="kk" hreflang="kk" data-title="Тұмау" data-language-autonym="Қазақша" data-language-local-name="Kazakh" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-rn mw-list-item"><a href="https://rn.wikipedia.org/wiki/Infuluwanza" title="Infuluwanza – Rundi" lang="rn" hreflang="rn" data-title="Infuluwanza" data-language-autonym="Ikirundi" data-language-local-name="Rundi" class="interlanguage-link-target"><span>Ikirundi</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Homa_ya_mafua" title="Homa ya mafua – Swahili" lang="sw" hreflang="sw" data-title="Homa ya mafua" data-language-autonym="Kiswahili" data-language-local-name="Swahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/Grip" title="Grip – Haitian Creole" lang="ht" hreflang="ht" data-title="Grip" data-language-autonym="Kreyòl ayisyen" data-language-local-name="Haitian Creole" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-gcr mw-list-item"><a href="https://gcr.wikipedia.org/wiki/Lagrip" title="Lagrip – Guianan Creole" lang="gcr" hreflang="gcr" data-title="Lagrip" data-language-autonym="Kriyòl gwiyannen" data-language-local-name="Guianan Creole" class="interlanguage-link-target"><span>Kriyòl gwiyannen</span></a></li><li class="interlanguage-link interwiki-ku mw-list-item"><a href="https://ku.wikipedia.org/wiki/Arsim" title="Arsim – Kurdish" lang="ku" hreflang="ku" data-title="Arsim" data-language-autonym="Kurdî" data-language-local-name="Kurdish" class="interlanguage-link-target"><span>Kurdî</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%93%D1%80%D0%B8%D0%BF%D0%BF" title="Грипп – Kyrgyz" lang="ky" hreflang="ky" data-title="Грипп" data-language-autonym="Кыргызча" data-language-local-name="Kyrgyz" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Influentia" title="Influentia – Latin" lang="la" hreflang="la" data-title="Influentia" data-language-autonym="Latina" data-language-local-name="Latin" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Gripa" title="Gripa – Latvian" lang="lv" hreflang="lv" data-title="Gripa" data-language-autonym="Latviešu" data-language-local-name="Latvian" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/Gripp" title="Gripp – Luxembourgish" lang="lb" hreflang="lb" data-title="Gripp" data-language-autonym="Lëtzebuergesch" data-language-local-name="Luxembourgish" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Gripas" title="Gripas – Lithuanian" lang="lt" hreflang="lt" data-title="Gripas" data-language-autonym="Lietuvių" data-language-local-name="Lithuanian" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-ln mw-list-item"><a href="https://ln.wikipedia.org/wiki/Mal%C3%A1li_na_m%C9%94p%C9%9Bp%C9%9B" title="Maláli na mɔpɛpɛ – Lingala" lang="ln" hreflang="ln" data-title="Maláli na mɔpɛpɛ" data-language-autonym="Lingála" data-language-local-name="Lingala" class="interlanguage-link-target"><span>Lingála</span></a></li><li class="interlanguage-link interwiki-lmo mw-list-item"><a href="https://lmo.wikipedia.org/wiki/Grippa" title="Grippa – Lombard" lang="lmo" hreflang="lmo" data-title="Grippa" data-language-autonym="Lombard" data-language-local-name="Lombard" class="interlanguage-link-target"><span>Lombard</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Influenza" title="Influenza – Hungarian" lang="hu" hreflang="hu" data-title="Influenza" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%93%D1%80%D0%B8%D0%BF" title="Грип – Macedonian" lang="mk" hreflang="mk" data-title="Грип" data-language-autonym="Македонски" data-language-local-name="Macedonian" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-mg mw-list-item"><a href="https://mg.wikipedia.org/wiki/Gripa" title="Gripa – Malagasy" lang="mg" hreflang="mg" data-title="Gripa" data-language-autonym="Malagasy" data-language-local-name="Malagasy" class="interlanguage-link-target"><span>Malagasy</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%87%E0%B5%BB%E0%B4%AB%E0%B5%8D%E0%B4%B2%E0%B5%81%E0%B4%B5%E0%B5%86%E0%B5%BB%E0%B4%B8" title="ഇൻഫ്ലുവെൻസ – Malayalam" lang="ml" hreflang="ml" data-title="ഇൻഫ്ലുവെൻസ" data-language-autonym="മലയാളം" data-language-local-name="Malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%87%E0%A4%A8%E0%A5%8D%E0%A4%AB%E0%A5%8D%E0%A4%B2%E0%A5%81%E0%A4%8F%E0%A4%A8%E0%A5%8D%E0%A4%9D%E0%A4%BE" title="इन्फ्लुएन्झा – Marathi" lang="mr" hreflang="mr" data-title="इन्फ्लुएन्झा" data-language-autonym="मराठी" data-language-local-name="Marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-xmf mw-list-item"><a href="https://xmf.wikipedia.org/wiki/%E1%83%92%E1%83%A0%E1%83%98%E1%83%9E%E1%83%98" title="გრიპი – Mingrelian" lang="xmf" hreflang="xmf" data-title="გრიპი" data-language-autonym="მარგალური" data-language-local-name="Mingrelian" class="interlanguage-link-target"><span>მარგალური</span></a></li><li class="interlanguage-link interwiki-arz mw-list-item"><a href="https://arz.wikipedia.org/wiki/%D8%A7%D9%86%D9%81%D9%84%D9%88%D9%86%D8%B2%D8%A7" title="انفلونزا – Egyptian Arabic" lang="arz" hreflang="arz" data-title="انفلونزا" data-language-autonym="مصرى" data-language-local-name="Egyptian Arabic" class="interlanguage-link-target"><span>مصرى</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Influenza" title="Influenza – Malay" lang="ms" hreflang="ms" data-title="Influenza" data-language-autonym="Bahasa Melayu" data-language-local-name="Malay" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-min mw-list-item"><a href="https://min.wikipedia.org/wiki/Influenza" title="Influenza – Minangkabau" lang="min" hreflang="min" data-title="Influenza" data-language-autonym="Minangkabau" data-language-local-name="Minangkabau" class="interlanguage-link-target"><span>Minangkabau</span></a></li><li class="interlanguage-link interwiki-cdo mw-list-item"><a href="https://cdo.wikipedia.org/wiki/Li%C3%B9-h%C3%A8ng-s%C3%A9ng_g%C4%81ng-m%C3%B4%CC%A4" title="Liù-hèng-séng gāng-mô̤ – Mindong" lang="cdo" hreflang="cdo" data-title="Liù-hèng-séng gāng-mô̤" data-language-autonym="閩東語 / Mìng-dĕ̤ng-ngṳ̄" data-language-local-name="Mindong" class="interlanguage-link-target"><span>閩東語 / Mìng-dĕ̤ng-ngṳ̄</span></a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/%E1%80%90%E1%80%AF%E1%80%95%E1%80%BA%E1%80%80%E1%80%BD%E1%80%B1%E1%80%B8%E1%80%9B%E1%80%B1%E1%80%AC%E1%80%82%E1%80%AB" title="တုပ်ကွေးရောဂါ – Burmese" lang="my" hreflang="my" data-title="တုပ်ကွေးရောဂါ" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="Burmese" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-fj mw-list-item"><a href="https://fj.wikipedia.org/wiki/Influenza" title="Influenza – Fijian" lang="fj" hreflang="fj" data-title="Influenza" data-language-autonym="Na Vosa Vakaviti" data-language-local-name="Fijian" class="interlanguage-link-target"><span>Na Vosa Vakaviti</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Griep" title="Griep – Dutch" lang="nl" hreflang="nl" data-title="Griep" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ne mw-list-item"><a href="https://ne.wikipedia.org/wiki/%E0%A4%87%E0%A4%A8%E0%A5%8D%E0%A4%AB%E0%A5%8D%E0%A4%B2%E0%A5%81%E0%A4%8F%E0%A4%A8%E0%A5%8D%E0%A4%9C%E0%A4%BE" title="इन्फ्लुएन्जा – Nepali" lang="ne" hreflang="ne" data-title="इन्फ्लुएन्जा" data-language-autonym="नेपाली" data-language-local-name="Nepali" class="interlanguage-link-target"><span>नेपाली</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%82%A4%E3%83%B3%E3%83%95%E3%83%AB%E3%82%A8%E3%83%B3%E3%82%B6" title="インフルエンザ – Japanese" lang="ja" hreflang="ja" data-title="インフルエンザ" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-frr badge-Q70894304 mw-list-item" title=""><a href="https://frr.wikipedia.org/wiki/Influenza" title="Influenza – Northern Frisian" lang="frr" hreflang="frr" data-title="Influenza" data-language-autonym="Nordfriisk" data-language-local-name="Northern Frisian" class="interlanguage-link-target"><span>Nordfriisk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Influensa" title="Influensa – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Influensa" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Influensa" title="Influensa – Norwegian Nynorsk" lang="nn" hreflang="nn" data-title="Influensa" data-language-autonym="Norsk nynorsk" data-language-local-name="Norwegian Nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Gripa" title="Gripa – Occitan" lang="oc" hreflang="oc" data-title="Gripa" data-language-autonym="Occitan" data-language-local-name="Occitan" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-or mw-list-item"><a href="https://or.wikipedia.org/wiki/%E0%AC%87%E0%AC%A8%E0%AD%8D%E2%80%8C%E0%AC%AB%E0%AD%8D%E0%AC%B2%E0%AD%81%E0%AC%8F%E0%AC%9E%E0%AD%8D%E0%AC%9C%E0%AC%BE" title="ଇନ୍‌ଫ୍ଲୁଏଞ୍ଜା – Odia" lang="or" hreflang="or" data-title="ଇନ୍‌ଫ୍ଲୁଏଞ୍ଜା" data-language-autonym="ଓଡ଼ିଆ" data-language-local-name="Odia" class="interlanguage-link-target"><span>ଓଡ଼ିଆ</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Gripp" title="Gripp – Uzbek" lang="uz" hreflang="uz" data-title="Gripp" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="Uzbek" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%87%E0%A8%A8%E0%A8%AB%E0%A8%B2%E0%A9%82%E0%A8%90%E0%A8%A8%E0%A8%9C%E0%A8%BC%E0%A8%BE" title="ਇਨਫਲੂਐਨਜ਼ਾ – Punjabi" lang="pa" hreflang="pa" data-title="ਇਨਫਲੂਐਨਜ਼ਾ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="Punjabi" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%D9%86%D8%B2%D9%84%DB%81" title="نزلہ – Western Punjabi" lang="pnb" hreflang="pnb" data-title="نزلہ" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-blk mw-list-item"><a href="https://blk.wikipedia.org/wiki/%E1%80%90%E1%80%AF%E1%80%90%E1%80%BA%E1%80%80%E1%80%BD%E1%80%B1%E1%80%B8%E1%80%9B%E1%80%B1%E1%80%AC%E1%82%8F%E1%80%82%E1%80%AB%E1%82%8F" title="တုတ်ကွေးရောႏဂါႏ – Pa&#039;O" lang="blk" hreflang="blk" data-title="တုတ်ကွေးရောႏဂါႏ" data-language-autonym="ပအိုဝ်ႏဘာႏသာႏ" data-language-local-name="Pa&#039;O" class="interlanguage-link-target"><span>ပအိုဝ်ႏဘာႏသာႏ</span></a></li><li class="interlanguage-link interwiki-pap mw-list-item"><a href="https://pap.wikipedia.org/wiki/Grip" title="Grip – Papiamento" lang="pap" hreflang="pap" data-title="Grip" data-language-autonym="Papiamentu" data-language-local-name="Papiamento" class="interlanguage-link-target"><span>Papiamentu</span></a></li><li class="interlanguage-link interwiki-jam mw-list-item"><a href="https://jam.wikipedia.org/wiki/Influenza" title="Influenza – Jamaican Creole English" lang="jam" hreflang="jam" data-title="Influenza" data-language-autonym="Patois" data-language-local-name="Jamaican Creole English" class="interlanguage-link-target"><span>Patois</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Gripp" title="Gripp – Low German" lang="nds" hreflang="nds" data-title="Gripp" data-language-autonym="Plattdüütsch" data-language-local-name="Low German" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Grypa" title="Grypa – Polish" lang="pl" hreflang="pl" data-title="Grypa" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt badge-Q17437796 badge-featuredarticle mw-list-item" title="featured article badge"><a href="https://pt.wikipedia.org/wiki/Gripe" title="Gripe – Portuguese" lang="pt" hreflang="pt" data-title="Gripe" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-kaa mw-list-item"><a href="https://kaa.wikipedia.org/wiki/Gripp" title="Gripp – Kara-Kalpak" lang="kaa" hreflang="kaa" data-title="Gripp" data-language-autonym="Qaraqalpaqsha" data-language-local-name="Kara-Kalpak" class="interlanguage-link-target"><span>Qaraqalpaqsha</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Grip%C4%83" title="Gripă – Romanian" lang="ro" hreflang="ro" data-title="Gripă" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-qu mw-list-item"><a href="https://qu.wikipedia.org/wiki/Chhulli" title="Chhulli – Quechua" lang="qu" hreflang="qu" data-title="Chhulli" data-language-autonym="Runa Simi" data-language-local-name="Quechua" class="interlanguage-link-target"><span>Runa Simi</span></a></li><li class="interlanguage-link interwiki-rue mw-list-item"><a href="https://rue.wikipedia.org/wiki/%D0%A5%D1%80%D0%B8%D0%BF%D0%BA%D0%B0" title="Хрипка – Rusyn" lang="rue" hreflang="rue" data-title="Хрипка" data-language-autonym="Русиньскый" data-language-local-name="Rusyn" class="interlanguage-link-target"><span>Русиньскый</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%93%D1%80%D0%B8%D0%BF%D0%BF" title="Грипп – Russian" lang="ru" hreflang="ru" data-title="Грипп" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sah mw-list-item"><a href="https://sah.wikipedia.org/wiki/%D0%93%D1%80%D0%B8%D0%BF%D0%BF" title="Грипп – Yakut" lang="sah" hreflang="sah" data-title="Грипп" data-language-autonym="Саха тыла" data-language-local-name="Yakut" class="interlanguage-link-target"><span>Саха тыла</span></a></li><li class="interlanguage-link interwiki-sco mw-list-item"><a href="https://sco.wikipedia.org/wiki/Haingles" title="Haingles – Scots" lang="sco" hreflang="sco" data-title="Haingles" data-language-autonym="Scots" data-language-local-name="Scots" class="interlanguage-link-target"><span>Scots</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Gripi" title="Gripi – Albanian" lang="sq" hreflang="sq" data-title="Gripi" data-language-autonym="Shqip" data-language-local-name="Albanian" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B6%89%E0%B6%B1%E0%B7%8A%E0%B7%86%E0%B7%8A%E0%B6%BD%E0%B7%94%E0%B7%80%E0%B7%99%E0%B6%B1%E0%B7%8A%E0%B7%83%E0%B7%8F" title="ඉන්ෆ්ලුවෙන්සා – Sinhala" lang="si" hreflang="si" data-title="ඉන්ෆ්ලුවෙන්සා" data-language-autonym="සිංහල" data-language-local-name="Sinhala" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-sd mw-list-item"><a href="https://sd.wikipedia.org/wiki/%D9%88%D8%A8%D8%A7%D8%A6%D9%8A_%D8%B2%DA%AA%D8%A7%D9%85" title="وبائي زڪام – Sindhi" lang="sd" hreflang="sd" data-title="وبائي زڪام" data-language-autonym="سنڌي" data-language-local-name="Sindhi" class="interlanguage-link-target"><span>سنڌي</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Chr%C3%ADpka" title="Chrípka – Slovak" lang="sk" hreflang="sk" data-title="Chrípka" data-language-autonym="Slovenčina" data-language-local-name="Slovak" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Gripa" title="Gripa – Slovenian" lang="sl" hreflang="sl" data-title="Gripa" data-language-autonym="Slovenščina" data-language-local-name="Slovenian" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-so mw-list-item"><a href="https://so.wikipedia.org/wiki/Hargab" title="Hargab – Somali" lang="so" hreflang="so" data-title="Hargab" data-language-autonym="Soomaaliga" data-language-local-name="Somali" class="interlanguage-link-target"><span>Soomaaliga</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D8%A6%DB%95%D9%86%D9%81%D9%84%DB%86%D9%86%D8%B2%D8%A7" title="ئەنفلۆنزا – Central Kurdish" lang="ckb" hreflang="ckb" data-title="ئەنفلۆنزا" data-language-autonym="کوردی" data-language-local-name="Central Kurdish" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%93%D1%80%D0%B8%D0%BF" title="Грип – Serbian" lang="sr" hreflang="sr" data-title="Грип" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Influenca" title="Influenca – Serbo-Croatian" lang="sh" hreflang="sh" data-title="Influenca" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Serbo-Croatian" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Influenssa" title="Influenssa – Finnish" lang="fi" hreflang="fi" data-title="Influenssa" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Influensa" title="Influensa – Swedish" lang="sv" hreflang="sv" data-title="Influensa" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Trangkaso" title="Trangkaso – Tagalog" lang="tl" hreflang="tl" data-title="Trangkaso" data-language-autonym="Tagalog" data-language-local-name="Tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%87%E0%AE%A9%E0%AF%8D%E0%AE%83%E0%AE%AA%E0%AF%81%E0%AE%B3%E0%AF%81%E0%AE%B5%E0%AF%86%E0%AE%A9%E0%AF%8D%E0%AE%9A%E0%AE%BE" title="இன்ஃபுளுவென்சா – Tamil" lang="ta" hreflang="ta" data-title="இன்ஃபுளுவென்சா" data-language-autonym="தமிழ்" data-language-local-name="Tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-kab mw-list-item"><a href="https://kab.wikipedia.org/wiki/Tussit" title="Tussit – Kabyle" lang="kab" hreflang="kab" data-title="Tussit" data-language-autonym="Taqbaylit" data-language-local-name="Kabyle" class="interlanguage-link-target"><span>Taqbaylit</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/%D0%93%D1%80%D0%B8%D0%BF%D0%BF" title="Грипп – Tatar" lang="tt" hreflang="tt" data-title="Грипп" data-language-autonym="Татарча / tatarça" data-language-local-name="Tatar" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%AB%E0%B1%8D%E0%B0%B2%E0%B1%82" title="ఫ్లూ – Telugu" lang="te" hreflang="te" data-title="ఫ్లూ" data-language-autonym="తెలుగు" data-language-local-name="Telugu" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-th badge-Q17437796 badge-featuredarticle mw-list-item" title="featured article badge"><a href="https://th.wikipedia.org/wiki/%E0%B9%84%E0%B8%82%E0%B9%89%E0%B8%AB%E0%B8%A7%E0%B8%B1%E0%B8%94%E0%B9%83%E0%B8%AB%E0%B8%8D%E0%B9%88" title="ไข้หวัดใหญ่ – Thai" lang="th" hreflang="th" data-title="ไข้หวัดใหญ่" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tg mw-list-item"><a href="https://tg.wikipedia.org/wiki/%D0%93%D1%80%D0%B8%D0%BF%D0%BF" title="Грипп – Tajik" lang="tg" hreflang="tg" data-title="Грипп" data-language-autonym="Тоҷикӣ" data-language-local-name="Tajik" class="interlanguage-link-target"><span>Тоҷикӣ</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Grip" title="Grip – Turkish" lang="tr" hreflang="tr" data-title="Grip" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-tk mw-list-item"><a href="https://tk.wikipedia.org/wiki/D%C3%BCmew" title="Dümew – Turkmen" lang="tk" hreflang="tk" data-title="Dümew" data-language-autonym="Türkmençe" data-language-local-name="Turkmen" class="interlanguage-link-target"><span>Türkmençe</span></a></li><li class="interlanguage-link interwiki-tyv mw-list-item"><a href="https://tyv.wikipedia.org/wiki/%D0%93%D1%80%D0%B8%D0%BF%D0%BF" title="Грипп – Tuvinian" lang="tyv" hreflang="tyv" data-title="Грипп" data-language-autonym="Тыва дыл" data-language-local-name="Tuvinian" class="interlanguage-link-target"><span>Тыва дыл</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%93%D1%80%D0%B8%D0%BF" title="Грип – Ukrainian" lang="uk" hreflang="uk" data-title="Грип" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D9%86%D8%B2%D9%84%DB%81" title="نزلہ – Urdu" lang="ur" hreflang="ur" data-title="نزلہ" data-language-autonym="اردو" data-language-local-name="Urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-vec mw-list-item"><a href="https://vec.wikipedia.org/wiki/Influensa" title="Influensa – Venetian" lang="vec" hreflang="vec" data-title="Influensa" data-language-autonym="Vèneto" data-language-local-name="Venetian" class="interlanguage-link-target"><span>Vèneto</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/C%C3%BAm" title="Cúm – Vietnamese" lang="vi" hreflang="vi" data-title="Cúm" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamese" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-wa mw-list-item"><a href="https://wa.wikipedia.org/wiki/Vir%C3%BBsse_del_gripe" title="Virûsse del gripe – Walloon" lang="wa" hreflang="wa" data-title="Virûsse del gripe" data-language-autonym="Walon" data-language-local-name="Walloon" class="interlanguage-link-target"><span>Walon</span></a></li><li class="interlanguage-link interwiki-vls mw-list-item"><a href="https://vls.wikipedia.org/wiki/Griep" title="Griep – West Flemish" lang="vls" hreflang="vls" data-title="Griep" data-language-autonym="West-Vlams" data-language-local-name="West Flemish" class="interlanguage-link-target"><span>West-Vlams</span></a></li><li class="interlanguage-link interwiki-war mw-list-item"><a href="https://war.wikipedia.org/wiki/Trangkaso" title="Trangkaso – Waray" lang="war" hreflang="war" data-title="Trangkaso" data-language-autonym="Winaray" data-language-local-name="Waray" class="interlanguage-link-target"><span>Winaray</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E6%B5%81%E8%A1%8C%E6%80%A7%E6%84%9F%E5%86%92" title="流行性感冒 – Wu" lang="wuu" hreflang="wuu" data-title="流行性感冒" data-language-autonym="吴语" data-language-local-name="Wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-ts mw-list-item"><a href="https://ts.wikipedia.org/wiki/Mukhuhlwana" title="Mukhuhlwana – Tsonga" lang="ts" hreflang="ts" data-title="Mukhuhlwana" data-language-autonym="Xitsonga" data-language-local-name="Tsonga" class="interlanguage-link-target"><span>Xitsonga</span></a></li><li class="interlanguage-link interwiki-yi mw-list-item"><a href="https://yi.wikipedia.org/wiki/%D7%92%D7%A8%D7%99%D7%A4%D7%A2" title="גריפע – Yiddish" lang="yi" hreflang="yi" data-title="גריפע" data-language-autonym="ייִדיש" data-language-local-name="Yiddish" class="interlanguage-link-target"><span>ייִדיש</span></a></li><li class="interlanguage-link interwiki-yo mw-list-item"><a href="https://yo.wikipedia.org/wiki/%C3%80r%C3%B9n_g%C3%A1g%C3%A1" title="Àrùn gágá – Yoruba" lang="yo" hreflang="yo" data-title="Àrùn gágá" data-language-autonym="Yorùbá" data-language-local-name="Yoruba" class="interlanguage-link-target"><span>Yorùbá</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E6%B5%81%E8%A1%8C%E6%80%A7%E6%84%9F%E5%86%92" title="流行性感冒 – Cantonese" lang="yue" hreflang="yue" data-title="流行性感冒" data-language-autonym="粵語" data-language-local-name="Cantonese" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link interwiki-bat-smg mw-list-item"><a href="https://bat-smg.wikipedia.org/wiki/Grips" title="Grips – Samogitian" lang="sgs" hreflang="sgs" data-title="Grips" data-language-autonym="Žemaitėška" data-language-local-name="Samogitian" class="interlanguage-link-target"><span>Žemaitėška</span></a></li><li class="interlanguage-link interwiki-zh badge-Q17437796 badge-featuredarticle mw-list-item" title="featured article badge"><a href="https://zh.wikipedia.org/wiki/%E6%B5%81%E8%A1%8C%E6%80%A7%E6%84%9F%E5%86%92" title="流行性感冒 – Chinese" lang="zh" hreflang="zh" data-title="流行性感冒" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q2840#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Change links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <div id="p-associated-pages" class="vector-menu 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encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"><span class="mw-redirectedfrom">(Redirected from <a href="/w/index.php?title=Flu&amp;redirect=no" class="mw-redirect" title="Flu">Flu</a>)</span></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><style data-mw-deduplicate="TemplateStyles:r9689576">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}body.skin-minerva .mw-parser-output .infobox-header,body.skin-minerva .mw-parser-output .infobox-subheader,body.skin-minerva .mw-parser-output .infobox-above,body.skin-minerva .mw-parser-output .infobox-title,body.skin-minerva .mw-parser-output .infobox-image,body.skin-minerva .mw-parser-output .infobox-full-data,body.skin-minerva .mw-parser-output .infobox-below{text-align:center}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data div{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data div{background:#1f1f23!important;color:#f8f9fa}}</style><table class="infobox"><tbody><tr><th colspan="2" class="infobox-above" style="background-color: lightgrey">Influenza</th></tr><tr><td colspan="2" class="infobox-subheader"><i>Classification and external resources</i></td></tr><tr><td colspan="2" class="infobox-image"><span typeof="mw:File/Frameless"><a href="/wiki/File:EM_of_influenza_virus.jpg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a4/EM_of_influenza_virus.jpg/226px-EM_of_influenza_virus.jpg" decoding="async" width="226" height="240" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a4/EM_of_influenza_virus.jpg/339px-EM_of_influenza_virus.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a4/EM_of_influenza_virus.jpg/452px-EM_of_influenza_virus.jpg 2x" data-file-width="700" data-file-height="743" /></a></span><div class="infobox-caption">Influenza virus, magnified approximately 100,000 times</div></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/International_Statistical_Classification_of_Diseases_and_Related_Health_Problems" class="mw-redirect" title="International Statistical Classification of Diseases and Related Health Problems">ICD</a>-<a href="/wiki/ICD-10" class="mw-redirect" title="ICD-10">10</a></th><td class="infobox-data"><a href="/wiki/ICD-10_Chapter_J" class="mw-redirect" title="ICD-10 Chapter J">J</a><a rel="nofollow" class="external text" href="http://www.who.int/classifications/apps/icd/icd10online/?gj09.htm+j10">10.</a>, <a href="/wiki/ICD-10_Chapter_J" class="mw-redirect" title="ICD-10 Chapter J">J</a><a rel="nofollow" class="external text" href="http://www.who.int/classifications/apps/icd/icd10online/?gj09.htm+j11">11.</a></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/International_Statistical_Classification_of_Diseases_and_Related_Health_Problems" class="mw-redirect" title="International Statistical Classification of Diseases and Related Health Problems">ICD</a>-<a href="/wiki/List_of_ICD-9_codes" title="List of ICD-9 codes">9</a></th><td class="infobox-data"><a rel="nofollow" class="external text" href="http://www.icd9data.com/getICD9Code.ashx?icd9=487">487</a></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Diseases_Database" title="Diseases Database">DiseasesDB</a></th><td class="infobox-data"><a rel="nofollow" class="external text" href="http://www.diseasesdatabase.com/ddb6791.htm">6791</a></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/MedlinePlus" title="MedlinePlus">MedlinePlus</a></th><td class="infobox-data"><a rel="nofollow" class="external text" href="https://www.nlm.nih.gov/medlineplus/ency/article/000080.htm">000080</a></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/EMedicine" title="EMedicine">eMedicine</a></th><td class="infobox-data"><a rel="nofollow" class="external text" href="http://www.emedicine.com/med/topic1170.htm">med/1170</a> <a rel="nofollow" class="external text" href="http://www.emedicine.com/ped/topic3006.htm">ped/3006</a></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Medical_Subject_Headings" title="Medical Subject Headings">MeSH</a></th><td class="infobox-data"><a rel="nofollow" class="external text" href="//www.nlm.nih.gov/cgi/mesh/2024/MB_cgi?field=uid&amp;term=D007251">D007251</a></td></tr></tbody></table> <p><b>Influenza</b>, better known as the <b>flu</b> and sometimes called the <b>grippe</b>, is a common childhood illness, but is not as common among adults. It is not limited to humans, most mammals and many birds can also catch influenza. It is caused by several different viruses, termed influenza viruses A, B, C, and D. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Flu_transmission_and_symptoms">Flu transmission and symptoms</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Influenza&amp;veaction=edit&amp;section=1" title="Change section: Flu transmission and symptoms" class="mw-editsection-visualeditor"><span>change</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Influenza&amp;action=edit&amp;section=1" title="Edit section&#039;s source code: Flu transmission and symptoms"><span>change source</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Human influenza can pass from one person to another very easily. It is most commonly spread by the microscopic droplets of <a href="/wiki/Mucus" title="Mucus">mucus</a> and fluid that are sent into the air when the sick person <a href="/wiki/Cough" title="Cough">coughs</a> or <a href="/wiki/Sneeze" title="Sneeze">sneezes</a>. <a href="/wiki/Symptom" title="Symptom">Symptoms</a> include cough, sore throat, <a href="/wiki/Muscle" title="Muscle">muscle</a> aches and pains, <a href="/wiki/Fever" title="Fever">fever</a>, headache, and rarely <a href="/wiki/Vomit" title="Vomit">vomiting</a> and <a href="/wiki/Diarrhoea" class="mw-redirect" title="Diarrhoea">diarrhea</a>. Influenza can also lead to other diseases, such as <a href="/wiki/Pneumonia" title="Pneumonia">pneumonia</a>. This makes it especially dangerous to young children and elderly people. </p><p>Although there is no cure for influenza, <a href="/wiki/Antiviral_drug" title="Antiviral drug">antiviral drugs</a> can be used to treat the illness so it is not as severe and does not last as long. Influenza <a href="/wiki/Vaccine" title="Vaccine">vaccines</a> are available worldwide, and are quite effective. They are changed each year as the virus changes. </p><p>The influenza season runs from late fall to spring because most people catch it in the winter months. When there are more cases of influenza than expected, it will sometimes be called an <a href="/wiki/Epidemic" title="Epidemic">epidemic</a>. When there are a large number of cases of the same type of influenza all over the world, it is often called a <a href="/wiki/Pandemic" title="Pandemic">pandemic</a>. </p> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Influenza&amp;veaction=edit&amp;section=2" title="Change section: History" class="mw-editsection-visualeditor"><span>change</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Influenza&amp;action=edit&amp;section=2" title="Edit section&#039;s source code: History"><span>change source</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The virus is ancient. It has infected humans for centuries.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">&#91;</span>1<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Changes_in_the_influenza_virus">Changes in the influenza virus</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Influenza&amp;veaction=edit&amp;section=3" title="Change section: Changes in the influenza virus" class="mw-editsection-visualeditor"><span>change</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Influenza&amp;action=edit&amp;section=3" title="Edit section&#039;s source code: Changes in the influenza virus"><span>change source</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Small changes that happen as flu is passed from one person to another is the most common way flu viruses change. This is the main reason that people can catch the flu every year. </p><p>The <a href="/wiki/CDC" class="mw-redirect" title="CDC">CDC</a> keeps track of the different flu viruses that are circulating, and gives this information to the companies that make flu "shots". Since the flu changes so much from year to year, flu shots have to be given each new flu season. </p><p>Flu shots only protect against the most common flu viruses, and every now and then a slightly different type spreads more than expected. Usually when this happens, the existing flu shot gives some protection so that even if a person who had a flu shot catches it, they do not get as sick. </p><p>Some flu viruses are caught from animals. <a href="/wiki/Bird_flu" class="mw-redirect" title="Bird flu">Bird flu</a>, for example, is usually only caught by people in contact with sick birds (usually <a href="/wiki/Chicken" title="Chicken">chickens</a>). These types of flu virus are usually very limited, and while they can make a person very ill, usually other people do not catch the virus from the sick person. </p><p>Another way that the flu can change is when a person or animal catches two different flu viruses. The two viruses can exchange some of their <a href="/wiki/Genetics" title="Genetics">genetic</a> information, which can create a brand new flu that nobody has ever caught before. </p><p>If an animal flu virus changes in this way to one that can easily pass from human to human, many people become ill because nobody has any immunity to the new virus. Often, a brand new virus is more severe and kills more people. </p><p>New types of flu virus are usually what causes pandemics, and that is the reason many scientists have been following bird flu so closely—it kills six people out of every ten who catch it. This would be a very serious problem if it changes enough to spread easily between people. </p> <div class="mw-heading mw-heading2"><h2 id="Swine_flu_(March/April_2009)"><span id="Swine_flu_.28March.2FApril_2009.29"></span>Swine flu (March/April 2009)</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Influenza&amp;veaction=edit&amp;section=4" title="Change section: Swine flu (March/April 2009)" class="mw-editsection-visualeditor"><span>change</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Influenza&amp;action=edit&amp;section=4" title="Edit section&#039;s source code: Swine flu (March/April 2009)"><span>change source</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>This new flu virus got its name because it contains genetic parts that are commonly found in flu viruses that infect pigs.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">&#91;</span>2<span class="cite-bracket">&#93;</span></a></sup> It is not spread by pigs or by eating pork—this is a new human virus being spread by humans. The name was the <a href="/wiki/2009_flu_pandemic" class="mw-redirect" title="2009 flu pandemic">2009 flu pandemic</a>. </p> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Influenza&amp;veaction=edit&amp;section=5" title="Change section: References" class="mw-editsection-visualeditor"><span>change</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Influenza&amp;action=edit&amp;section=5" title="Edit section&#039;s source code: References"><span>change source</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r9724317">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text">Morens D.M, Taubenberger J.K, Folkers G.K, Fauci A.S. 2010. Pandemic influenza's 500th anniversary. <i>Clinical Infectious Diseases</i>. <b>51</b> (12): 1442–1444. doi:10.1086/657429. PMC 3106245. <a class="external mw-magiclink-pmid" rel="nofollow" href="//www.ncbi.nlm.nih.gov/pubmed/21067353?dopt=Abstract">PMID 21067353</a>.</span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r9724332">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFMaster" class="citation web cs1">Master, OEC Web. <a rel="nofollow" class="external text" href="https://www.cdc.gov/media/transcripts/2009/t090423.htm">"CDC Press Briefing Transcripts April 23, 2009"</a>. <i>www.cdc.gov</i>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=www.cdc.gov&amp;rft.atitle=CDC+Press+Briefing+Transcripts+April+23%2C+2009&amp;rft.aulast=Master&amp;rft.aufirst=OEC+Web&amp;rft_id=https%3A%2F%2Fwww.cdc.gov%2Fmedia%2Ftranscripts%2F2009%2Ft090423.htm&amp;rfr_id=info%3Asid%2Fsimple.wikipedia.org%3AInfluenza" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Other_websites">Other websites</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Influenza&amp;veaction=edit&amp;section=6" title="Change section: Other websites" class="mw-editsection-visualeditor"><span>change</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Influenza&amp;action=edit&amp;section=6" title="Edit section&#039;s source code: Other websites"><span>change source</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://www.cdc.gov/flu/">CDC info on influenza</a></li> <li><a rel="nofollow" class="external text" href="http://www.who.int/mediacentre/factsheets/fs211/en/index.html">World Health Organization Fact Sheet</a> Overview of influenza.</li> <li><a rel="nofollow" class="external text" href="http://www.nhsdirect.nhs.uk/en.aspx?articleId=163&amp;sectionId=1725">NHS Direct Health encyclopedia entry</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20110826115641/http://www.nhsdirect.nhs.uk/en.aspx?articleId=163&amp;sectionId=1725">Archived</a> 2011-08-26 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a></li> <li><a rel="nofollow" class="external text" href="http://sunzi.lib.hku.hk/hkuto/view/B30456721/ft.pdf">Both overview and technical details on influenza viruses with emphasis on the potential H5N1 pandemic</a> Includes details of various nonhuman influenza viruses. Extensive and well done.</li> <li><a rel="nofollow" class="external text" href="http://www.medicinenet.com/influenza/article.htm">Another overview of influenza</a></li></ul> <!-- NewPP limit report Parsed by mw‐web.eqiad.main‐5dc468848‐p2tmf Cached time: 20241123132701 Cache expiry: 2592000 Reduced expiry: false Complications: [vary‐revision‐sha1, show‐toc] CPU time usage: 0.145 seconds Real time usage: 0.198 seconds Preprocessor visited node count: 435/1000000 Post‐expand include size: 8241/2097152 bytes Template argument size: 625/2097152 bytes Highest expansion depth: 10/100 Expensive parser function count: 2/500 Unstrip recursion depth: 1/20 Unstrip post‐expand size: 5856/5000000 bytes Lua time usage: 0.076/10.000 seconds Lua memory usage: 2593695/52428800 bytes Number of Wikibase entities loaded: 0/400 --> <!-- Transclusion expansion time report (%,ms,calls,template) 100.00% 167.655 1 -total 56.27% 94.339 1 Template:Reflist 45.82% 76.815 1 Template:Cite_web 35.03% 58.726 1 Template:Infobox_disease 32.88% 55.122 1 Template:Infobox 7.10% 11.907 1 Template:Webarchive 3.32% 5.563 1 Template:Mesh2 2.38% 3.982 2 Template:ICD10 2.31% 3.878 1 Template:Px 1.58% 2.648 1 Template:ICD9 --> <!-- Saved in parser cache with key simplewiki:pcache:idhash:19823-0!canonical and timestamp 20241123132701 and revision id 9759581. 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