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class="vector-toc-numb">2</span> <span>Outbreak investigation</span> </div> </a> <ul id="toc-Outbreak_investigation-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Types" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Types"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Types</span> </div> </a> <ul id="toc-Types-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Condition_for_Declaring_an_Outbreak_Over" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Condition_for_Declaring_an_Outbreak_Over"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Condition for Declaring an Outbreak Over</span> </div> </a> <ul id="toc-Condition_for_Declaring_an_Outbreak_Over-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Outbreak_legislation" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Outbreak_legislation"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Outbreak legislation</span> </div> </a> <ul id="toc-Outbreak_legislation-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>See also</span> </div> </a> <ul id="toc-See_also-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">7</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>External links</span> </div> </a> <ul id="toc-External_links-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">Disease outbreak</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 21 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-21" 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">21 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AA%D9%81%D8%B4%D9%8A_(%D9%88%D8%A8%D8%A7%D8%A6%D9%8A%D8%A7%D8%AA)" title="تفشي (وبائيات) – Arabic" lang="ar" hreflang="ar" data-title="تفشي (وبائيات)" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Brot_epid%C3%A8mic" title="Brot epidèmic – Catalan" lang="ca" hreflang="ca" data-title="Brot epidèmic" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-dag mw-list-item"><a href="https://dag.wikipedia.org/wiki/Outbreak" title="Outbreak – Dagbani" lang="dag" hreflang="dag" data-title="Outbreak" data-language-autonym="Dagbanli" data-language-local-name="Dagbani" class="interlanguage-link-target"><span>Dagbanli</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Ausbruch_(Epidemiologie)" title="Ausbruch (Epidemiologie) – German" lang="de" hreflang="de" data-title="Ausbruch (Epidemiologie)" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Brote_epid%C3%A9mico" title="Brote epidémico – Spanish" lang="es" hreflang="es" data-title="Brote epidémico" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Agerraldi_(epidemiologia)" title="Agerraldi (epidemiologia) – Basque" lang="eu" hreflang="eu" data-title="Agerraldi (epidemiologia)" 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/%D9%87%D9%85%D9%87%E2%80%8C%DA%AF%DB%8C%D8%B1%DB%8C_%D9%85%D8%AD%D8%AF%D9%88%D8%AF" title="همه‌گیری محدود – Persian" lang="fa" hreflang="fa" data-title="همه‌گیری محدود" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%B3%91%EB%B0%9C%EC%83%9D" title="병발생 – Korean" lang="ko" hreflang="ko" data-title="병발생" 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/Annoba" title="Annoba – Hausa" lang="ha" hreflang="ha" data-title="Annoba" data-language-autonym="Hausa" data-language-local-name="Hausa" class="interlanguage-link-target"><span>Hausa</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Wabah" title="Wabah – Indonesian" lang="id" hreflang="id" data-title="Wabah" 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-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%94%D7%AA%D7%A4%D7%A8%D7%A6%D7%95%D7%AA_%D7%9E%D7%97%D7%9C%D7%94" title="התפרצות מחלה – Hebrew" lang="he" hreflang="he" data-title="התפרצות מחלה" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%82%A2%E3%82%A6%E3%83%88%E3%83%96%E3%83%AC%E3%82%A4%E3%82%AF" title="アウトブレイク – Japanese" lang="ja" hreflang="ja" data-title="アウトブレイク" 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-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Surto" title="Surto – Portuguese" lang="pt" hreflang="pt" data-title="Surto" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Shp%C3%ABrthim_i_s%C3%ABmundjes" title="Shpërthim i sëmundjes – Albanian" lang="sq" hreflang="sq" data-title="Shpërthim i sëmundjes" data-language-autonym="Shqip" data-language-local-name="Albanian" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Outbreak" title="Outbreak – Simple English" lang="en-simple" hreflang="en-simple" data-title="Outbreak" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Izbruh_bolezni" title="Izbruh bolezni – Slovenian" lang="sl" hreflang="sl" data-title="Izbruh bolezni" data-language-autonym="Slovenščina" data-language-local-name="Slovenian" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Sjukdomsutbrott" title="Sjukdomsutbrott – Swedish" lang="sv" hreflang="sv" data-title="Sjukdomsutbrott" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%81%E0%B8%B2%E0%B8%A3%E0%B8%9B%E0%B8%B0%E0%B8%97%E0%B8%B8%E0%B8%82%E0%B8%AD%E0%B8%87%E0%B9%82%E0%B8%A3%E0%B8%84" title="การปะทุของโรค – Thai" lang="th" hreflang="th" data-title="การปะทุของโรค" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Salg%C4%B1n" title="Salgın – Turkish" lang="tr" hreflang="tr" data-title="Salgın" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A1%D0%BF%D0%B0%D0%BB%D0%B0%D1%85_%D1%96%D0%BD%D1%84%D0%B5%D0%BA%D1%86%D1%96%D0%B9%D0%BD%D0%BE%D1%97_%D1%85%D0%B2%D0%BE%D1%80%D0%BE%D0%B1%D0%B8" title="Спалах інфекційної хвороби – Ukrainian" lang="uk" hreflang="uk" data-title="Спалах інфекційної хвороби" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E7%96%BE%E7%97%85%E7%88%86%E5%8F%91" title="疾病爆发 – Chinese" lang="zh" hreflang="zh" data-title="疾病爆发" data-language-autonym="中文" data-language-local-name="Chinese" 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</div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"><span class="mw-redirectedfrom">(Redirected from <a href="/w/index.php?title=Outbreak&redirect=no" class="mw-redirect" title="Outbreak">Outbreak</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"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Sudden increase in occurrences of a disease</div> <p class="mw-empty-elt"> </p> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote 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For other uses, see <a href="/wiki/Outbreak_(disambiguation)" class="mw-disambig" title="Outbreak (disambiguation)">Outbreak (disambiguation)</a>.</div> <figure typeof="mw:File/Thumb"><a href="/wiki/File:Difference_between_outbreak,_endemic,_epidemic_and_pandemic-en.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c1/Difference_between_outbreak%2C_endemic%2C_epidemic_and_pandemic-en.png/350px-Difference_between_outbreak%2C_endemic%2C_epidemic_and_pandemic-en.png" decoding="async" width="350" height="197" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c1/Difference_between_outbreak%2C_endemic%2C_epidemic_and_pandemic-en.png/525px-Difference_between_outbreak%2C_endemic%2C_epidemic_and_pandemic-en.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c1/Difference_between_outbreak%2C_endemic%2C_epidemic_and_pandemic-en.png/700px-Difference_between_outbreak%2C_endemic%2C_epidemic_and_pandemic-en.png 2x" data-file-width="1280" data-file-height="720" /></a><figcaption>Difference between outbreak, <a href="/wiki/Endemic_(epidemiology)" title="Endemic (epidemiology)">endemic</a>, <a href="/wiki/Epidemic" title="Epidemic">epidemic</a> and <a href="/wiki/Pandemic" title="Pandemic">pandemic</a></figcaption></figure> <p>In <a href="/wiki/Epidemiology" title="Epidemiology">epidemiology</a>, an <b>outbreak</b> is a sudden increase in occurrences of a <a href="/wiki/Disease" title="Disease">disease</a> when cases are in excess of normal expectancy for the location or season. It may affect a small and localized group or impact upon thousands of people across an entire continent. The number of cases varies according to the disease-causing agent, and the size and type of previous and existing exposure to the agent. Outbreaks include many <a href="/wiki/Epidemics" class="mw-redirect" title="Epidemics">epidemics</a>, which term is normally only for <a href="/wiki/Infectious_diseases" class="mw-redirect" title="Infectious diseases">infectious diseases</a>, as well as diseases with an environmental origin, such as a water or <a href="/wiki/Foodborne_illness" title="Foodborne illness">foodborne disease</a>. They may affect a region in a country or a group of countries. <a href="/wiki/Pandemics" class="mw-redirect" title="Pandemics">Pandemics</a> are near-global disease outbreaks when multiple and various countries around the <a href="/wiki/Earth" title="Earth">Earth</a> are soon infected. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Definition">Definition</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Disease_outbreak&action=edit&section=1" title="Edit section: Definition"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The terms "outbreak" and "epidemic" have often been used interchangeably. Researchers Manfred S. Green and colleagues propose that the latter term be restricted to larger events, pointing out that <i><a href="/wiki/Chambers_Dictionary" title="Chambers Dictionary">Chambers Concise Dictionary</a></i> and <i><a href="/wiki/Stedman%27s_Medical_Dictionary" title="Stedman's Medical Dictionary">Stedman's Medical Dictionary</a></i> acknowledge this distinction.<sup id="cite_ref-Green_2002_1-0" class="reference"><a href="#cite_note-Green_2002-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Outbreak_investigation">Outbreak investigation</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Disease_outbreak&action=edit&section=2" title="Edit section: Outbreak investigation"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Epidemic_curves.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/15/Epidemic_curves.jpg/220px-Epidemic_curves.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/15/Epidemic_curves.jpg/330px-Epidemic_curves.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/15/Epidemic_curves.jpg/440px-Epidemic_curves.jpg 2x" data-file-width="960" data-file-height="720" /></a><figcaption>Epidemic curves</figcaption></figure> <p>When investigating disease outbreaks, the epidemiology profession has developed a number of widely accepted steps. As described by the United States <a href="/wiki/Centers_for_Disease_Control_and_Prevention" title="Centers for Disease Control and Prevention">Centers for Disease Control and Prevention</a>, these include the following:<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p> <ul><li>Identify the existence of the outbreak (Is the group of ill persons normal for the time of year, geographic area, etc.?)</li> <li>Verify the diagnosis related to the outbreak</li> <li>Create a <a href="/wiki/Case_definition" class="mw-redirect" title="Case definition">case definition</a> to define who/what is included as a case</li> <li>Map the spread of the outbreak using <a href="/wiki/Information_technology" title="Information technology">Information technology</a> as diagnosis is reported to insurance</li> <li>Develop a hypothesis (What appears to be causing the outbreak?)</li> <li>Study hypotheses (collect data and perform analysis)</li> <li>Refine hypothesis and carry out further study</li> <li>Develop and implement control and prevention systems</li> <li>Release findings to greater communities</li></ul> <p>The order of the above steps and relative amount of effort and resources used in each varies from outbreak to outbreak.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> For example, prevention and control measures are usually implemented very early in the investigation, often before the causative agent is known. In many situations, promoting good hygiene and hand-washing is one of the first things recommended. Other interventions may be added as the investigation moves forward and more information is obtained. Waiting until the end of an investigation to implement prevention and control measures is a sure way to lose ones job. In outbreaks identified through notifiable disease surveillance, reports are often linked to laboratory results and verifying the diagnosis is straight forward. In outbreaks of unknown etiology, determining and verifying the diagnosis can be a significant part of the investigation with respect to time and resources. Several steps are usually going on at any point in time during the investigation. Steps may be repeated. For example, initial case definitions are often established to be intentionally broad but later refined as more is learned about the outbreak. The above list has 9 steps, others have more. Implementing active surveillance to identify additional cases is often added.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p><p>Outbreak debriefing and review has also been recognized as an additional final step and iterative process by the Public Health Agency of Canada.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Types">Types</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Disease_outbreak&action=edit&section=3" title="Edit section: Types"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>There are several outbreak patterns, which can be useful in identifying the transmission method or source, and predicting the future rate of infection. Each has a distinctive <a href="/wiki/Epidemic_curve" title="Epidemic curve">epidemic curve</a>, or <a href="/wiki/Histogram" title="Histogram">histogram</a> of case infections and deaths.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <ul><li>Common source – All victims acquire the infection from the same source (e.g. a contaminated water supply).<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> <ul><li>Continuous source – Common source outbreak where the exposure occurs over multiple incubation periods</li> <li>Point source – Common source outbreak where the exposure occurs in less than one incubation period<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup></li></ul></li> <li>Propagated – Transmission occurs from person to person.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup></li></ul> <p>Outbreaks can also be: </p> <ul><li>Behavioral risk related (e.g., <a href="/wiki/Sexually_transmitted_disease" class="mw-redirect" title="Sexually transmitted disease">sexually transmitted diseases</a>, increased risk due to <a href="/wiki/Malnutrition" title="Malnutrition">malnutrition</a>)<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup></li> <li><a href="/wiki/Zoonotic" class="mw-redirect" title="Zoonotic">Zoonotic</a> – The infectious agent is endemic to an animal population, infection is transferred to humans.</li></ul> <p>Patterns of occurrence are: </p> <ul><li><a href="/wiki/Endemic_(epidemiology)" title="Endemic (epidemiology)">Endemic</a> – a communicable disease, such as influenza, measles, mumps, pneumonia, colds, viruses, and smallpox, which is characteristic of a particular place, or among a particular group, or area of interest or activity.</li> <li><a href="/wiki/Epidemic" title="Epidemic">Epidemic</a> – when this disease is found to infect a significantly larger number of people at the same time than is common at that time, and among that population, and may spread through one or several communities.</li> <li><a href="/wiki/Pandemic" title="Pandemic">Pandemic</a> – occurs when an epidemic spreads worldwide.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Condition_for_Declaring_an_Outbreak_Over">Condition for Declaring an Outbreak Over</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Disease_outbreak&action=edit&section=4" title="Edit section: Condition for Declaring an Outbreak Over"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>By convention, a communicable disease outbreak is declared over when a period of twice the <a href="/wiki/Incubation_period" title="Incubation period">incubation period</a> of the infectious disease has elapsed without identification of any new case, however, for organisms with a short incubation period (e.g. fewer than ten days), a period of three times the incubation period is preferred.<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Outbreak_legislation">Outbreak legislation</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Disease_outbreak&action=edit&section=5" title="Edit section: Outbreak legislation"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Outbreak legislation is still in its infancy and not many countries have had a direct and complete set of the provisions.<sup id="cite_ref-ol_12-0" class="reference"><a href="#cite_note-ol-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-oapl_13-0" class="reference"><a href="#cite_note-oapl-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> However, some countries do manage the outbreaks using relevant acts, such as <a href="/wiki/Public_health_law" title="Public health law">public health law</a>.<sup id="cite_ref-lpe_14-0" class="reference"><a href="#cite_note-lpe-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> <a href="/wiki/World_Health_Organization" title="World Health Organization">World Health Organization</a> member states are obligated by <a href="/wiki/International_Health_Regulations" title="International Health Regulations">International Health Regulations</a> to <a href="/wiki/International_Health_Regulations#Outbreak_reporting" title="International Health Regulations">report outbreaks</a>. WHO member states are holding a special session in November 2021 to consider the <a href="/w/index.php?title=International_Treaty_for_Pandemic_Preparedness_and_Response&action=edit&redlink=1" class="new" title="International Treaty for Pandemic Preparedness and Response (page does not exist)">International Treaty for Pandemic Preparedness and Response</a> to establish further legal obligations in managing disease outbreaks.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Disease_outbreak&action=edit&section=6" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1259569809">.mw-parser-output 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Congo Ebola virus outbreak">2014 Democratic Republic of the Congo Ebola virus outbreak</a></li> <li><a href="/wiki/COVID-19_pandemic_by_country_and_territory" title="COVID-19 pandemic by country and territory">2019–present coronavirus pandemic by country and territory</a></li> <li><a href="/wiki/Superspreading_event" title="Superspreading event">Superspreading event</a></li></ul> <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=Disease_outbreak&action=edit&section=7" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.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 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data-mw-deduplicate="TemplateStyles:r1238218222">.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="CITEREFGreenSwartzMaysharLev2002" class="citation journal cs1">Green MS, Swartz T, Mayshar E, Lev B, Leventhal A, Slater PE, Shemer J (2002). <a rel="nofollow" class="external text" href="https://www.ima.org.il/FilesUpload/IMAJ/0/55/27606.pdf">"When is an epidemic an epidemic?"</a> <span class="cs1-format">(PDF)</span>. <i>Israel Medical Association Journal</i>. <b>4</b> (1): 3–6. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/11802306">11802306</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Israel+Medical+Association+Journal&rft.atitle=When+is+an+epidemic+an+epidemic%3F&rft.volume=4&rft.issue=1&rft.pages=3-6&rft.date=2002&rft_id=info%3Apmid%2F11802306&rft.aulast=Green&rft.aufirst=MS&rft.au=Swartz%2C+T&rft.au=Mayshar%2C+E&rft.au=Lev%2C+B&rft.au=Leventhal%2C+A&rft.au=Slater%2C+PE&rft.au=Shemer%2C+J&rft_id=https%3A%2F%2Fwww.ima.org.il%2FFilesUpload%2FIMAJ%2F0%2F55%2F27606.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADisease+outbreak" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://www.cdc.gov/excite/classroom/outbreak/steps.htm">Steps of an Outbreak Investigation</a>, EXCITE | Epidemiology in the Classroom | Outbreak Steps</span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a 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href="/wiki/Template:Concepts_in_infectious_disease" title="Template:Concepts in infectious disease"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Concepts_in_infectious_disease" title="Template talk:Concepts in infectious disease"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Concepts_in_infectious_disease" title="Special:EditPage/Template:Concepts in infectious disease"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Concepts_in_infectious_disease_(Outline)" style="font-size:114%;margin:0 4em">Concepts in <a href="/wiki/Infection" title="Infection">infectious disease</a> (<a href="/wiki/Outline_of_infectious_disease_concepts" title="Outline of infectious disease concepts">Outline</a>)</div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Determinants</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;"><a href="/wiki/Pathogen" title="Pathogen">Agent</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Biofilm#Infectious_diseases" title="Biofilm">Biofilm</a></li> <li><a href="/wiki/Germ_theory_of_disease" title="Germ theory of disease">Germ theory of disease</a></li> <li><a href="/wiki/Infectivity" title="Infectivity">Infectivity</a> <ul><li><a href="/wiki/Minimal_infective_dose" title="Minimal infective dose">Infectious dose</a></li></ul></li> <li><a href="/wiki/Pathogenicity" class="mw-redirect" title="Pathogenicity">Pathogenicity</a> <ul><li><a href="/wiki/Attack_rate" title="Attack rate">Attack rate</a></li></ul></li> <li><a href="/wiki/Quorum_sensing" title="Quorum sensing">Quorum sensing</a></li> <li><a href="/wiki/Virulence" title="Virulence">Virulence</a> <ul><li><a href="/wiki/Endotoxin" class="mw-redirect" title="Endotoxin">Endotoxin</a></li> <li><a href="/wiki/Exotoxin" title="Exotoxin">Exotoxin</a></li> <li><a href="/wiki/Case_fatality_rate" title="Case fatality rate">Case fatality rate</a></li> <li><a href="/wiki/Virulence_factor" title="Virulence factor">factors</a></li></ul></li> <li><a href="/wiki/Antimicrobial_resistance" title="Antimicrobial resistance">Antimicrobial resistance</a> <ul><li><a href="/wiki/Drug_resistance" title="Drug resistance">Drug resistance</a></li> <li><a href="/wiki/Horizontal_gene_transfer" title="Horizontal gene transfer">Horizontal gene transfer</a></li> <li><a href="/wiki/Multidrug-resistant_bacteria" title="Multidrug-resistant bacteria">Multidrug-resistant bacteria</a></li></ul></li> <li><a href="/wiki/Host_tropism" title="Host tropism">Host tropism</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;"><a href="/wiki/Host_(biology)" title="Host (biology)">Host</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Burn#Complications" title="Burn">Burn</a></li> <li><a href="/wiki/Comorbidity" title="Comorbidity">Comorbidity</a></li> <li><a href="/wiki/Diabetic_foot_infection" title="Diabetic foot infection">Diabetes</a></li> <li><a href="/wiki/Host%E2%80%93pathogen_interaction" title="Host–pathogen interaction">Host–pathogen interaction</a></li> <li><a href="/wiki/Immune_response" title="Immune response">Immune response</a> <ul><li><a href="/wiki/Immunodeficiency" title="Immunodeficiency">Immunodeficiency</a></li> <li><a href="/wiki/Immunosuppression" title="Immunosuppression">Immunosuppression</a></li></ul></li> <li><a href="/wiki/Microbial_symbiosis_and_immunity" title="Microbial symbiosis and immunity">Microbiome health</a></li> <li><a href="/wiki/Opportunistic_infection" title="Opportunistic infection">Opportunistic infection</a></li> <li><a href="/wiki/Risk_of_infection" title="Risk of infection">Risk of infection</a></li> <li><a href="/wiki/Susceptible_individual" title="Susceptible individual">Susceptible individual</a> <ul><li>Age</li> <li>Gender</li> <li>Nutrition status</li> <li>Vaccination status</li> <li>Genetic predisposition</li> <li>Behavioral/lifestyle factors <ul><li><a href="/wiki/Health_effects_of_tobacco#infection" title="Health effects of tobacco">Smoking</a></li></ul></li> <li>Pregnancy</li> <li>Stress levels</li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;"><a href="/wiki/Environmental_epidemiology" title="Environmental epidemiology">Environment</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/WASH" title="WASH">Access to water, sanitation and hygiene</a></li> <li>Air quality</li> <li>Biodiversity loss</li> <li><a href="/wiki/Climate_change_and_infectious_diseases" title="Climate change and infectious diseases">Climate change</a></li> <li>Climate zones <ul><li><a href="/wiki/El_Ni%C3%B1o#Health_and_social_impacts" class="mw-redirect" title="El Niño">El Niño</a></li> <li><a href="/wiki/Tropical_disease#Relation_of_climate_to_tropical_diseases" title="Tropical disease">Tropical diseases</a></li></ul></li> <li><a href="/wiki/Globalization_and_disease" title="Globalization and disease">Commerce</a></li> <li><a href="/wiki/Deforestation#Health_effects" title="Deforestation">Deforestation</a></li> <li><a href="/wiki/Disease_ecology" title="Disease ecology">Ecology</a></li> <li><a href="/wiki/Humidity#Human_health" title="Humidity">Humidity</a></li> <li><a href="/wiki/Needle_sharing" title="Needle sharing">Injection drug use</a></li> <li>Natural disaster <ul><li><a href="/wiki/Flood#Health_effects" title="Flood">Flood</a></li></ul></li> <li><a href="/wiki/Zoonosis#Farming,_ranching_and_animal_husbandry" title="Zoonosis">Poultry and livestock</a></li> <li><a href="/wiki/Diseases_of_poverty" title="Diseases of poverty">Poverty</a></li> <li><a href="/wiki/Travel_medicine" title="Travel medicine">Travel</a></li> <li><a href="/wiki/Urbanization#Infections" title="Urbanization">Urbanization</a></li> <li><a href="/wiki/Vector_control" title="Vector control">Vector control</a></li> <li><a href="/wiki/Conflict_epidemiology" title="Conflict epidemiology">War and conflict</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Transmission_(medicine)" class="mw-redirect" title="Transmission (medicine)">Transmission</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Basic_concepts" scope="row" class="navbox-group" style="width:1%;text-align:left;">Basic <br />concepts</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Asymptomatic_carrier" title="Asymptomatic carrier">Asymptomatic carrier</a></li> <li><a href="/wiki/Infection#Pathophysiology" title="Infection">Chain of infection</a></li> <li><a href="/wiki/Fomite" title="Fomite">Fomite</a></li> <li><a href="/wiki/Host_(biology)" title="Host (biology)">Host</a></li> <li><a href="/wiki/Incubation_period" title="Incubation period">Incubation period</a></li> <li><a href="/wiki/Index_case" title="Index case">Index case</a></li> <li><a href="/wiki/Infectious_period" title="Infectious period">Infectious period</a></li> <li><a href="/wiki/Latent_period_(epidemiology)" title="Latent period (epidemiology)">Latent period</a></li> <li><a href="/wiki/Natural_reservoir" title="Natural reservoir">Natural reservoir</a></li> <li><a href="/wiki/Opportunistic_infection" title="Opportunistic infection">Opportunistic infection</a></li> <li><a href="/wiki/Subclinical_infection" title="Subclinical infection">Silent/Subclinical infection</a></li> <li><a href="/wiki/Superinfection" title="Superinfection">Superinfection</a></li> <li><a href="/wiki/Super-spreader" class="mw-redirect" title="Super-spreader">Super-spreader</a></li> <li><a href="/wiki/Viral_load" title="Viral load">Viral load</a></li> <li><a href="/wiki/Window_period" title="Window period">Window period</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;">Modes</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;">Endogenous</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>Endogenous overgrowth</li> <li><a href="/wiki/Human_microbiome#Disease_and_death" title="Human microbiome">Normal flora overgrowth</a></li> <li><a href="/wiki/Virus_latency" title="Virus latency">Endogenous reactivation</a></li> <li>Microbial translocation</li> <li>Endogenous seeding</li> <li><a href="/wiki/Biofilm" title="Biofilm">Biofilm</a> formation</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;">Exogenous</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;"><a href="/wiki/Cross-species_transmission" title="Cross-species transmission">Cross-species</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Spillover_infection" title="Spillover infection">Spillover infection</a></li> <li><a href="/wiki/Vector_(epidemiology)" class="mw-redirect" title="Vector (epidemiology)">Vector</a></li> <li><a href="/wiki/Zoonosis" title="Zoonosis">Zoonosis</a></li> <li><a href="/wiki/Reverse_zoonosis" title="Reverse zoonosis">Reverse zoonosis</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;"><a href="/wiki/Human-to-human_transmission" title="Human-to-human transmission">Human-to-human</a><br />/Cross-infection</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Contagious_disease" title="Contagious disease">Contagious disease</a></li> <li>Source <ul><li><a href="/wiki/Hospital-acquired_infection" title="Hospital-acquired infection">Nosocomial/Hospital</a></li> <li><a href="/wiki/Iatrogenesis" title="Iatrogenesis">Iatrogenic/Medical care</a></li></ul></li> <li>Generational difference <ul><li><a href="/wiki/Vertically_transmitted_infection" title="Vertically transmitted infection">Vertical/Congenital</a> <ul><li>Prenatal</li> <li>Perinatal</li> <li><a href="/wiki/Neonatal_infection" title="Neonatal infection">Neonatal</a></li></ul></li> <li><a href="/wiki/Transmission_(medicine)#Horizontal_transmission" class="mw-redirect" title="Transmission (medicine)">Horizontal</a></li></ul></li> <li><a href="/wiki/Breakthrough_infection" title="Breakthrough infection">Breakthrough infection</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;">Environment-<br />to-human</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Sapronosis" title="Sapronosis">Sapronosis</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;">Routes</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;">Respiratory</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Airborne_disease" class="mw-redirect" title="Airborne disease">Air</a></li> <li><a href="/wiki/Bioaerosol" title="Bioaerosol">Bioaerosol</a> <ul><li><a href="/wiki/Aerosol-generating_procedure" title="Aerosol-generating procedure">Aerosol-generating procedure</a></li></ul></li> <li><a href="/wiki/Dental_aerosol" title="Dental aerosol">Dental aerosol</a></li> <li><a href="/wiki/Respiratory_droplet#Role_in_disease_transmission" title="Respiratory droplet">Respiratory droplet</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;">Linked to<br />Vascular system</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Blood-borne_disease" title="Blood-borne disease">Blood-borne disease</a></li> <li>Percutaneous inoculation <ul><li><a href="/wiki/Injection_(medicine)#Infection" title="Injection (medicine)">Injection site</a></li> <li><a href="/wiki/Intravenous_therapy#Infection_and_inflammation" title="Intravenous therapy">Intravenous line</a></li> <li>Insect bite</li> <li><a href="/wiki/Animal_bite#Infection" title="Animal bite">Animal bite</a></li></ul></li> <li>Surgical intervention <ul><li><a href="/wiki/Postoperative_wounds#Infection" title="Postoperative wounds">Postoperative wound</a></li> <li><a href="/wiki/Surgical_site_infection" title="Surgical site infection">Surgical site infection</a></li></ul></li> <li>Vector-borne <ul><li><a href="/wiki/Mosquito-borne_disease" title="Mosquito-borne disease">Mosquito</a></li> <li><a href="/wiki/Tick-borne_disease" title="Tick-borne disease">Tick</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;">Gastrointestinal</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Foodborne_illness" title="Foodborne illness">Food</a> <ul><li><a href="/wiki/Food_contaminant" title="Food contaminant">Contamination</a></li></ul></li> <li><a href="/wiki/Breastfeeding_contraindications" title="Breastfeeding contraindications">Breastmilk</a></li> <li><a href="/wiki/Waterborne_disease" title="Waterborne disease">Water</a></li> <li><a href="/wiki/Fecal%E2%80%93oral_route" title="Fecal–oral route">Feces</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;">Cutaneous</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Burn#Complications" title="Burn">Burn</a></li> <li><a href="/wiki/Fomite" title="Fomite">Fomite</a></li> <li><a href="/wiki/Soil-transmitted_helminthiasis" title="Soil-transmitted helminthiasis">Soil</a></li> <li>Open <a href="/wiki/Wound" title="Wound">wound</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;">Genitourinary</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Sexually_transmitted_infection" title="Sexually transmitted infection">Sex</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;">Trans-placental</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>Prenatal</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;">Cervico-vaginal</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>Perinatal</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;">Other</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Eye_disease" title="Eye disease">Ocular (Eye) mucosal membrane</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;"><a href="/wiki/Mathematical_modelling_of_infectious_disease" class="mw-redirect" title="Mathematical modelling of infectious disease">Modelling</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Agent-based_model_in_biology#Bacteria_aggregation_leading_to_biofilm_formation" title="Agent-based model in biology">Agent-based model</a></li> <li><a href="/wiki/Animal_disease_model" title="Animal disease model">Animal disease model</a></li> <li><a href="/wiki/Attack_rate" title="Attack rate">Attack rate</a></li> <li><a href="/wiki/Basic_reproduction_number" title="Basic reproduction number">Basic reproduction number</a></li> <li><a href="/wiki/Compartmental_models_in_epidemiology" title="Compartmental models in epidemiology">Compartmental models in epidemiology</a></li> <li><a href="/wiki/Critical_community_size" title="Critical community size">Critical community size</a></li> <li><a href="/wiki/Force_of_infection" title="Force of infection">Force of infection</a></li> <li><a href="/wiki/Herd_immunity" title="Herd immunity">Herd immunity</a></li> <li><a href="/wiki/Infection_rate" title="Infection rate">Infection rate</a></li> <li><a href="/wiki/Artificial_intelligence_in_healthcare" title="Artificial intelligence in healthcare">Machine learning</a></li> <li><a href="/wiki/Multiplicity_of_infection" title="Multiplicity of infection">Multiplicity of infection</a></li> <li><a href="/wiki/Serial_interval" title="Serial interval">Serial interval</a></li> <li><a href="/wiki/WAIFW_matrix" title="WAIFW matrix">WAIFW matrix</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;">Occurrence<br />in population</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Disease_cluster" title="Disease cluster">Cluster</a></li> <li><a href="/wiki/Endemic_(epidemiology)" title="Endemic (epidemiology)">Endemic</a></li> <li><a href="/wiki/Epidemic" title="Epidemic">Epidemic</a> <ul><li><a href="/wiki/Epidemic_curve" title="Epidemic curve">Curve</a></li> <li><a href="/wiki/Farr%27s_laws" title="Farr's laws">Farr's laws</a></li></ul></li> <li><a href="/wiki/Holoendemic" title="Holoendemic">Holoendemic</a></li> <li><a href="/wiki/Hyperendemic" title="Hyperendemic">Hyperendemic</a></li> <li><a href="/wiki/Incidence_(epidemiology)" title="Incidence (epidemiology)">Incidence</a></li> <li><a href="/wiki/Inequality_in_disease" title="Inequality in disease">Inequality</a></li> <li><a href="/wiki/Mesoendemic" class="mw-redirect" title="Mesoendemic">Mesoendemic</a></li> <li><a class="mw-selflink selflink">Outbreak</a></li> <li><a href="/wiki/Pandemic" title="Pandemic">Pandemic</a></li> <li><a href="/wiki/Prevalence" title="Prevalence">Prevalence</a></li> <li><a href="/wiki/Epidemic#Seasonality" title="Epidemic">Seasonality</a></li> <li><a href="/wiki/Spatial_epidemiology" title="Spatial epidemiology">Geographic distribution</a></li> <li><a href="/wiki/Sporadic_disease" title="Sporadic disease">Sporadic</a></li> <li><a href="/wiki/Syndemic" title="Syndemic">Syndemic</a></li> <li><a href="/wiki/Twindemic" title="Twindemic">Twindemic</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Anatomical <br />location</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>Respiratory <ul><li><a href="/wiki/Upper_respiratory_tract_infection" title="Upper respiratory tract infection">Ear-Nose-Throat/Upper respiratory tract</a></li> <li><a href="/wiki/Lower_respiratory_tract_infection" title="Lower respiratory tract infection">Chest/Lower respiratory tract</a></li></ul></li> <li><a href="/wiki/Gastrointestinal_infection" class="mw-redirect" title="Gastrointestinal infection">Gastrointestinal</a> <ul><li><a href="/wiki/Intestinal_infectious_diseases" title="Intestinal infectious diseases">Intestinal</a></li></ul></li> <li>Genitourinary</li> <li>Nervous system</li> <li><a href="/wiki/Skin_infection" title="Skin infection">Skin</a></li> <li>Soft tissue</li> <li><a href="/wiki/Bone_infection" class="mw-redirect" title="Bone infection">Bone</a></li> <li><a href="/wiki/Joint_infection" class="mw-redirect" title="Joint infection">Joint</a></li> <li>Cardiovascular</li> <li><a href="/wiki/Systemic_disease" title="Systemic disease">Systemic/Generalized</a></li> <li><a href="/wiki/Sepsis" title="Sepsis">Blood</a></li> <li><a href="/wiki/Odontogenic_infection" title="Odontogenic infection">Tooth</a></li> <li><a href="/wiki/Mouth_infection" title="Mouth infection">Mouth</a></li> <li><a href="/wiki/Intra-amniotic_infection" class="mw-redirect" title="Intra-amniotic infection">Fetus</a></li> <li>Eye</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Infection_prevention_and_control" title="Infection prevention and control">Prevention<br />and Control<br />measures</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;">Pharmaceutical</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Antibiotic" title="Antibiotic">Antibiotic</a> <ul><li><a href="/wiki/Antibiotic_prophylaxis" title="Antibiotic prophylaxis">prophylactic</a></li></ul></li> <li><a href="/wiki/Antifungal" title="Antifungal">Antifungal</a></li> <li><a href="/wiki/Anthelmintic" title="Anthelmintic">Anthelmintic</a> <ul><li><a href="/wiki/Ascaricide" title="Ascaricide">Ascaricide</a></li></ul></li> <li><a href="/wiki/Antimicrobial" title="Antimicrobial">Antimicrobial</a> <ul><li><a href="/wiki/Antimicrobial_stewardship" title="Antimicrobial stewardship">Antimicrobial stewardship</a></li></ul></li> <li><a href="/wiki/Antiseptic" title="Antiseptic">Antiseptic</a></li> <li><a href="/wiki/Antiviral_drug" title="Antiviral drug">Antiviral</a></li> <li><a href="/wiki/Asepsis" title="Asepsis">Asepsis</a></li> <li><a href="/wiki/Combination_therapy" title="Combination therapy">Combination</a></li> <li><a href="/wiki/Pharmacovigilance" title="Pharmacovigilance">Drug safety</a></li> <li><a href="/wiki/Immunization" title="Immunization">Immunization</a></li> <li><a href="/wiki/Immunotherapy" title="Immunotherapy">Immunotherapy</a> <ul><li><a href="/wiki/Monoclonal_antibody_therapy" title="Monoclonal antibody therapy">Monoclonal antibody therapy</a></li></ul></li> <li><a href="/wiki/Inoculation" title="Inoculation">Inoculation</a></li> <li><a href="/wiki/Phage_therapy" title="Phage therapy">Phage therapy</a></li> <li><a href="/wiki/Pre-exposure_prophylaxis" title="Pre-exposure prophylaxis">Pre-exposure prophylaxis</a></li> <li><a href="/wiki/Post-exposure_prophylaxis" title="Post-exposure prophylaxis">Post-exposure prophylaxis</a></li> <li><a href="/wiki/Drug_repositioning" title="Drug repositioning">Repurposed drugs</a></li> <li><a href="/wiki/Vaccination" title="Vaccination">Vaccination</a> <ul><li><a href="/wiki/Vaccine_efficacy" title="Vaccine efficacy">efficacy/effectiveness</a></li> <li><a href="/wiki/Booster_dose" title="Booster dose">booster</a></li> <li><a href="/wiki/Vaccine_resistance" title="Vaccine resistance">resistance</a></li> <li><a href="/wiki/Vaccine-preventable_disease" title="Vaccine-preventable disease">Vaccine-preventable disease</a></li> <li><a href="/wiki/Ring_vaccination" title="Ring vaccination">Ring vaccination</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:left;"><a href="/wiki/Non-pharmaceutical_intervention_(epidemiology)" title="Non-pharmaceutical intervention (epidemiology)">Non-<br />pharmaceutical</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Contact_tracing" title="Contact tracing">Contact tracing</a></li> <li><a href="/wiki/Cordon_sanitaire_(medicine)" title="Cordon sanitaire (medicine)">Cordon sanitaire</a></li> <li><a href="/wiki/Disease_surveillance" title="Disease surveillance">Disease surveillance</a></li> <li><a href="/wiki/Disinfectant" title="Disinfectant">Disinfection</a></li> <li><a href="/wiki/Flattening_the_curve" title="Flattening the curve">Flattening the curve</a></li> <li><a href="/wiki/Hygiene" title="Hygiene">Hygiene</a> <ul><li><a href="/wiki/Food_safety" title="Food safety">Food hygiene</a></li> <li><a href="/wiki/Hand_washing" title="Hand washing">Hand washing</a></li> <li><a href="/wiki/Medical_glove" title="Medical glove">Gloves</a></li></ul></li> <li><a href="/wiki/Isolation_(health_care)" title="Isolation (health care)">Isolation</a> <ul><li><a href="/wiki/Barrier_nursing" title="Barrier nursing">Barrier nursing</a></li></ul></li> <li><a href="/wiki/Stay-at-home_order" title="Stay-at-home order">Lockdown</a></li> <li><a href="/wiki/Notifiable_disease" title="Notifiable disease">Notification</a> <ul><li><a href="/wiki/List_of_notifiable_diseases" title="List of notifiable diseases">list</a></li></ul></li> <li><a href="/wiki/Protective_sequestration" title="Protective sequestration">Protective sequestration</a></li> <li><a href="/wiki/Public_health" title="Public health">Public health</a> <ul><li><a href="/wiki/Community_health" title="Community health">Community health</a> services</li> <li><a href="/wiki/Health_communication" title="Health communication">Health communication</a></li> <li><a href="/wiki/Health_education" title="Health education">Health education</a></li></ul></li> <li><a href="/wiki/Outbreak_response" title="Outbreak response">Outbreak response</a></li> <li><a href="/wiki/Quarantine" title="Quarantine">Quarantine</a></li> <li><a href="/wiki/Source_control_(respiratory_disease)" title="Source control (respiratory disease)">Respiratory source control</a> <ul><li><a href="/wiki/N95_respirator" title="N95 respirator">N95 respirator</a></li> <li><a href="/wiki/Surgical_mask" title="Surgical mask">Surgical mask</a></li> <li><a href="/wiki/Personal_protective_equipment" title="Personal protective equipment">PPE</a></li></ul></li> <li><a href="/wiki/Safe_sex" title="Safe sex">Safe sex</a></li> <li><a href="/wiki/Sanitation" title="Sanitation">Sanitation</a></li> <li><a href="/wiki/Screening_(medicine)" title="Screening (medicine)">Screening</a></li> <li><a href="/wiki/Social_distancing" title="Social distancing">Social distancing</a></li> <li><a href="/wiki/Sterilization_(microbiology)" title="Sterilization (microbiology)">Sterilization</a></li> <li><a href="/wiki/Transmission-based_precautions" title="Transmission-based precautions">Transmission-based precautions</a></li> <li><a href="/wiki/Travel_ban" title="Travel ban">Travel restrictions</a></li> <li><a href="/wiki/Universal_precautions" title="Universal precautions">Universal precautions</a></li> <li><a href="/wiki/Vector_control" title="Vector control">Vector control</a></li> <li><a href="/wiki/Wastewater_surveillance" title="Wastewater surveillance">Wastewater surveillance</a></li> <li>Zoning</li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Emerging_infectious_disease" title="Emerging infectious disease">Emerging <br />infections</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Antigenic_drift" title="Antigenic drift">Antigenic drift</a></li> <li><a href="/wiki/Antigenic_shift" title="Antigenic shift">Antigenic shift</a></li> <li>Antimicrobial resistance surveillance <ul><li><a href="/wiki/EARS-Net" title="EARS-Net">EARS-Net</a></li></ul></li> <li><a href="/wiki/Biosecurity" title="Biosecurity">Biosecurity</a></li> <li><a href="/wiki/CRISPR" title="CRISPR">CRISPR</a></li> <li><a href="/wiki/Disease_X" title="Disease X">Disease X</a></li> <li><a href="/wiki/Emergent_virus" title="Emergent virus">Emergent virus</a></li> <li><a href="/wiki/Evolutionary_epidemiology" title="Evolutionary epidemiology">Evolutionary epidemiology</a></li> <li><a href="/wiki/Genetic_epidemiology" title="Genetic epidemiology">Genetic epidemiology</a></li> <li><a href="/wiki/Global_Health_Initiatives" title="Global Health Initiatives">Global Health Initiatives</a></li> <li><a href="/wiki/Microbial_phylogenetics" title="Microbial phylogenetics">Microbial phylogenetics</a></li> <li><a href="/wiki/One_Health_Model" title="One Health Model">One Health Model</a></li> <li><a href="/wiki/Reassortment" title="Reassortment">Genomic reassortment</a></li> <li>Re-emerging disease</li> <li><a href="/wiki/Reverse_zoonosis" title="Reverse zoonosis">Reverse zoonosis</a></li> <li><a href="/wiki/Evolutionary_pressure#Antibiotic_resistance" title="Evolutionary pressure">Selection pressure</a></li> <li><a href="/wiki/Synthetic_biology" title="Synthetic biology">Synthetic biology</a></li> <li><a href="/wiki/Viral_phylodynamics" title="Viral phylodynamics">Viral phylodynamics</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Discovery_of_disease-causing_pathogens" title="Discovery of disease-causing pathogens">Discovery</a></li> <li><a href="/wiki/Eradication_of_infectious_diseases" title="Eradication of infectious diseases">Eradication</a></li> <li>Economics of Infectious Diseases</li> <li><a href="/wiki/Infectious_disease_(medical_specialty)" class="mw-redirect" title="Infectious disease (medical specialty)">Infectious disease (medical specialty)</a></li> <li><a href="/wiki/Disease_informatics" title="Disease informatics">Infectious disease informatics</a></li> <li><a href="/wiki/Bioterrorism" title="Bioterrorism">Microbial bioterrorism</a></li> <li><a href="/wiki/Pandemic_prevention" title="Pandemic prevention">Pandemic prevention</a></li> <li><a href="/wiki/Tropical_disease" title="Tropical disease">Tropical disease</a> <ul><li><a href="/wiki/Tropical_medicine" title="Tropical medicine">Tropical medicine</a></li></ul></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Natural_disasters_–_list_by_death_toll" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Natural_disasters" title="Template:Natural disasters"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Natural_disasters" title="Template talk:Natural disasters"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Natural_disasters" title="Special:EditPage/Template:Natural disasters"><abbr title="Edit this 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title="Landslide">Landslide</a></li> <li><a href="/wiki/Avalanche" title="Avalanche">Avalanche</a></li> <li><a href="/wiki/Mudflow" title="Mudflow">Mudflow</a></li> <li><a href="/wiki/Debris_flow" title="Debris flow">Debris flow</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Earthquake" title="Earthquake">Earthquake</a><br />(<a href="/wiki/Lists_of_earthquakes" title="Lists of earthquakes">List</a>)</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Seismic_hazard" title="Seismic hazard">Seismic hazard</a></li> <li><a href="/wiki/Seismic_risk" title="Seismic risk">Seismic risk</a></li> <li><a href="/wiki/Soil_liquefaction" title="Soil liquefaction">Soil liquefaction</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Types_of_volcanic_eruptions" title="Types of volcanic eruptions">Volcano eruption</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Pyroclastic_flow" title="Pyroclastic flow">Pyroclastic flow</a> <ul><li><a href="/wiki/Lahar" title="Lahar">Lahar</a></li></ul></li> <li><a href="/wiki/Volcanic_ash" title="Volcanic ash">Volcanic ash</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Erosion" title="Erosion">Natural erosion</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Sinkhole" title="Sinkhole">Sinkhole</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Hydrological</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Flood" title="Flood">Flood</a><br />(<a href="/wiki/List_of_floods" title="List of floods">List</a>)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Coastal_flood" class="mw-redirect" title="Coastal flood">Coastal flood</a></li> <li><a href="/wiki/Flash_flood" title="Flash flood">Flash flood</a></li> <li><a href="/wiki/Storm_surge" title="Storm surge">Storm surge</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Tsunami" title="Tsunami">Tsunami</a> <ul><li><a href="/wiki/Megatsunami" title="Megatsunami">Megatsunami</a></li></ul></li> <li><a href="/wiki/Limnic_eruption" title="Limnic eruption">Limnic eruption</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Meteorological</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Temperature</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Blizzard" title="Blizzard">Blizzard</a></li> <li><a href="/wiki/Cold_wave" title="Cold wave">Cold wave</a></li> <li><a href="/wiki/Ice_storm" title="Ice storm">Ice storm</a></li> <li><a href="/wiki/Heat_wave" title="Heat wave">Heat wave</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Drought" title="Drought">Drought</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Megadrought" title="Megadrought">Megadrought</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Cyclonic storms</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bomb_cyclone" class="mw-redirect" title="Bomb cyclone">Bomb cyclone</a></li> <li><a href="/wiki/Thunderstorm" title="Thunderstorm">Thunderstorm</a> (<a href="/wiki/Hail" title="Hail">Hail</a>)</li> <li><a href="/wiki/Tornado" title="Tornado">Tornado</a> (<a href="/wiki/Tornado_outbreak" title="Tornado outbreak">Tornado outbreak</a>)</li> <li><a href="/wiki/Tropical_cyclone" title="Tropical cyclone">Tropical cyclone</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Derecho" title="Derecho">Derecho</a></li> <li><a href="/wiki/Wildfire" title="Wildfire">Wildfire</a> <ul><li><a href="/wiki/Firestorm" title="Firestorm">Firestorm</a></li></ul></li> <li><a href="/wiki/ARkStorm" title="ARkStorm">ARkStorm</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Astronomical</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Potentially_hazardous_object" title="Potentially hazardous object">Potentially hazardous object</a></li> <li><a href="/wiki/Impact_event" title="Impact event">Impact event</a></li> <li><a href="/wiki/Meteor_shower" title="Meteor shower">Meteor shower</a></li> <li><a href="/wiki/Geomagnetic_storm" title="Geomagnetic storm">Geomagnetic storm</a></li> <li><a href="/wiki/Solar_flare" title="Solar flare">Solar flare</a></li> <li><a href="/wiki/Supernova" title="Supernova">Supernova</a></li> <li><a href="/wiki/Hypernova" title="Hypernova">Hypernova</a></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Disease_outbreak&oldid=1237443727">https://en.wikipedia.org/w/index.php?title=Disease_outbreak&oldid=1237443727</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:Epidemiology" title="Category:Epidemiology">Epidemiology</a></li><li><a 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