Interim Estimates of Vaccine Effectiveness of BNT162b2 and mRNA-1273 COVID-19 Vaccines in Preventing SARS-CoV-2 Infection Among Health Care Personnel, First Responders, and Other Essential and Frontline Workers - Eight U.S. Locations, December 2020-March 2021

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class="collections-action-panel-form action-panel-content action-form action-panel-smaller-selectors" data-existing-collections-url="/list-existing-collections/" data-add-to-existing-collection-url="/add-to-existing-collection/" data-create-and-add-to-new-collection-url="/create-and-add-to-new-collection/" data-get-article-ids-by-search-url="/get-article-ids-by-search/" data-myncbi-max-collection-name-length="100" data-add-to-collection-max-amount="1000" data-collections-root-url="https://www.ncbi.nlm.nih.gov/myncbi/collections/"> <input type="hidden" name="csrfmiddlewaretoken" value="p4pDIShh3q4PSVMHFGmGp4N4bgwPiZPPS0oztv73Crkli3U6XvW6qGSdB4TCIY0i"> <div class="choice-group" role="radiogroup"> <ul class="radio-group-items"> <li> <input type="radio" id="collections-action-panel-new" class="collections-new" name="collections" value="new" data-ga-category="save_share" data-ga-action="collections" data-ga-label="collections_radio_new"> <label for="collections-action-panel-new">Create a new collection</label> </li> <li> <input type="radio" id="collections-action-panel-existing" class="collections-existing" name="collections" value="existing" checked="true" data-ga-category="save_share" data-ga-action="collections" data-ga-label="collections_radio_existing"> <label for="collections-action-panel-existing">Add to an existing collection</label> </li> </ul> </div> <div class="controls-wrapper"> <div class="action-panel-control-wrap new-collections-controls"> <label for="collections-action-panel-add-to-new" class="action-panel-label required-field-asterisk"> Name your collection: </label> <input type="text" name="add-to-new-collection" id="collections-action-panel-add-to-new" class="collections-action-add-to-new" pattern="[^"&=<>\/]*" title="The following characters are not allowed in the Name field: "&=<>/" maxlength="100" data-ga-category="save_share" data-ga-action="create_collection" data-ga-label="non_favorties_collection"> <div class="collections-new-name-too-long usa-input-error-message selection-validation-message"> Name must be less than 100 characters </div> </div> <div class="action-panel-control-wrap existing-collections-controls"> <label for="collections-action-panel-add-to-existing" class="action-panel-label"> Choose a collection: </label> <select id="collections-action-panel-add-to-existing" class="action-panel-selector collections-action-add-to-existing" data-ga-category="save_share" data-ga-action="select_collection" data-ga-label="($('#collections-action-add-to-existing').val() === 'Favorites') ? 'Favorites' : 'non_favorites_collection'"> </select> <div class="collections-retry-load-on-error usa-input-error-message selection-validation-message"> Unable to load your collection due to an error<br> <a href="#">Please try again</a> </div> </div> </div> <div class="action-panel-actions"> <button class="action-panel-submit" type="submit" data-loading-label="Adding..." data-pinger-ignore data-ga-category="save_share" data-ga-action="collections" data-ga-label="add"> Add </button> <button class="action-panel-cancel" aria-label="Close 'Add to Collections' panel" ref="linksrc=close_collections_panel" aria-controls="collections-action-panel" aria-expanded="false" data-ga-category="save_share" data-ga-action="collections" data-ga-label="cancel"> Cancel </button> </div> </form> </div> </div> <div id="bibliography-action-panel" class="bibliography-action-panel action-panel in-progress-dots-panel" aria-hidden="true" data-bibliography-open-panel-enabled="false" data-bibliography-open-panel-url-hash="#open-bibliography-panel"> <div class="inner-wrap"> <h3 class="action-panel-heading"> Add to My Bibliography </h3> <form id="bibliography-action-panel-form" class="bibliography-action-panel-form action-panel-content action-form action-panel-smaller-selectors" data-add-to-bibliography-max-amount="100" data-add-to-bibliography-batch-size="10" data-bibliography-delegates-url="/list-bibliography-delegates/" data-add-to-bibliography-url="/add-to-bibliography/" data-get-article-ids-by-search-url="/get-article-ids-by-search/" data-mybib-root-url="https://www.ncbi.nlm.nih.gov/myncbi/collections/mybibliography/"> <input type="hidden" name="csrfmiddlewaretoken" value="p4pDIShh3q4PSVMHFGmGp4N4bgwPiZPPS0oztv73Crkli3U6XvW6qGSdB4TCIY0i"> <div class="action-panel-control-wrap bibliographies-controls"> <div class="choice-group"> <ul class="bibliographies-action-add radio-group-items"> <li> <input name="bibliography" id="my-bibliography" class="my-bibliography" type="radio" checked/> <label for="my-bibliography">My Bibliography</label> </li> </ul> </div> </div> <div class="bibliographies-retry-load-on-error usa-input-error-message selection-validation-message"> Unable to load your delegates due to an error<br> <a href="#">Please try again</a> </div> <div class="action-panel-actions"> <button class="action-panel-submit" type="submit" data-loading-label="Adding..." data-pinger-ignore> Add </button> <button class="action-panel-cancel" aria-label="Close 'Add to bibliography' panel" ref="linksrc=close_bibliography_panel" aria-controls="bibliography-action-panel" aria-expanded="false" data-ga-category="save_share" data-ga-action="mybib" data-ga-label="cancel"> Cancel </button> </div> </form> </div> </div> <div id="saved-search-action-panel" class="saved-search-action-panel action-panel " aria-hidden="true" data-saved-search-open-panel-enabled="false" data-saved-search-open-panel-url-hash="#open-saved-search-panel"> <div class="inner-wrap"> <h2 class="action-panel-heading"> Your saved search </h2> <form id="saved-search-action-panel-form" class="saved-search-action-panel-form action-panel-content action-form" data-create-saved-search-url="/create-saved-search/" data-try-search-terms-url="/try-search-term/" data-saved-search-root-url="https://www.ncbi.nlm.nih.gov/myncbi/searches/"> <input type="hidden" name="csrfmiddlewaretoken" value="p4pDIShh3q4PSVMHFGmGp4N4bgwPiZPPS0oztv73Crkli3U6XvW6qGSdB4TCIY0i"> <div class="action-panel-control-wrap"> <label for="saved-search-name" class="action-panel-label saved-search-name-label required-field-asterisk"> Name of saved search: </label> <input maxlength="200" type="text" name="saved-search-name" id="saved-search-name" class="saved-search-name" value="" required pattern="[^"&=<>\/]*" title="The following characters are not allowed in the Name field: "&=<>/"> </div> <div class="action-panel-control-wrap"> <label for="saved-search-term" class="action-panel-label required-field-asterisk"> Search terms: </label> <textarea name="saved-search-term" id="saved-search-term" class="saved-search-term" required></textarea> </div> <div class="test-search-term-wrap"> <a href="#" class="try-search-term">Test search terms</a> </div> <div class="choice-group action-panel-extra-margin-top"> <span class="action-panel-label" id="fieldset-label"> Would you like email updates of new search results? </span> <fieldset id="saved-search-alert" aria-describedby="fieldset-label"> <legend class="usa-sr-only">Saved Search Alert Radio Buttons</legend> <ul class="radio-group-items"> <li> <input type="radio" id="saved-search-alert-yes" class="saved-search-alert-yes" name="saved-search-alert" value="yes" checked> <label for="saved-search-alert-yes" class="action-panel-label">Yes</label> </li> <li> <input aria-label="No radio input" type="radio" id="saved-search-alert-no" class="saved-search-alert-no" name="saved-search-alert" value="no"> <label for="saved-search-alert-no" class="action-panel-label">No</label> </li> </ul> </fieldset> </div> <div class="alert-schedule-wrap"> <div class="action-panel-control-wrap"> <label class="action-panel-label"> Email: </label> <span aria-label="Email address" id="saved-search-email" class="action-panel-label"><span class="action-panel-label-bold"></span> (<a class="myncbi-account-settings" href="https://www.ncbi.nlm.nih.gov/account/settings/">change</a>)</span> </div> <div class="action-panel-control-wrap action-panel-extra-margin-top"> <label for="saved-search-frequency" class="action-panel-label"> Frequency: </label> <select id="saved-search-frequency" class="no-border-panel-selector saved-search-frequency"> <option value="monthly">Monthly</option> <option value="weekly">Weekly</option> <option value="daily">Daily</option> </select> </div> <div class="action-panel-control-wrap saved-search-monthly-additional"> <label for="saved-search-monthly-on-day" class="action-panel-label"> Which day? </label> <select id="saved-search-monthly-on-day" class="no-border-panel-selector"> <option value="Sunday">The first Sunday</option> <option value="Monday">The first Monday</option> <option value="Tuesday">The first Tuesday</option> <option value="Wednesday">The first Wednesday</option> <option value="Thursday">The first Thursday</option> <option value="Friday">The first Friday</option> <option value="Saturday">The first Saturday</option> <option value="day">The first day</option> <option value="weekday">The first weekday</option> </select> </div> <div class="action-panel-control-wrap saved-search-weekly-additional"> <label for="saved-search-weekly-on-day" class="action-panel-label"> Which day? </label> <select id="saved-search-weekly-on-day" class="no-border-panel-selector saved-search-weekly-on-day"> <option value="Sunday">Sunday</option> <option value="Monday">Monday</option> <option value="Tuesday">Tuesday</option> <option value="Wednesday">Wednesday</option> <option value="Thursday">Thursday</option> <option value="Friday">Friday</option> <option value="Saturday">Saturday</option> </select> </div> <div class="action-panel-control-wrap"> <label for="saved-search-report" class="action-panel-label"> Report format: </label> <select id="saved-search-report" class="no-border-panel-selector saved-search-report"> <option value="DocSum">Summary</option> <option value="DocSumText">Summary (text)</option> <option value="Abstract">Abstract</option> <option value="AbstractText">Abstract (text)</option> <option value="MEDLINE">PubMed</option> </select> </div> <div class="action-panel-control-wrap"> <label for="saved-search-amount" class="action-panel-label"> Send at most: </label> <select id="saved-search-amount" class="no-border-panel-selector saved-search-amount"> <option value="1">1 item</option> <option value="5" selected>5 items</option> <option value="10">10 items</option> <option value="20">20 items</option> <option value="50">50 items</option> <option value="100">100 items</option> <option value="200">200 items</option> </select> </div> <div> <input type="checkbox" id="saved-search-send-if-no-result" class="saved-search-send-if-no-result" name="saved-search-send-if-no-result"> <label for="saved-search-send-if-no-result" class="action-panel-label smaller-checkbox"> Send even when there aren't any new results </label> </div> <div class="action-panel-control-wrap option-text-in-email-wrap"> <label for="saved-search-email-text" class="action-panel-label"> Optional text in email: </label> <textarea name="saved-search-email-text" id="saved-search-email-text" class="saved-search-email-text"></textarea> </div> </div> <div class="action-panel-actions"> <button class="action-panel-submit" type="submit" data-loading-label="Saving..." data-ga-category="save_share" data-ga-action="alert" data-ga-label="save"> Save </button> <button class="action-panel-cancel" aria-label="Close 'Your saved search' panel" ref="linksrc=close_saved_search_panel" aria-controls="saved-search-action-panel" aria-expanded="false" data-ga-category="save_share" data-ga-action="alert" data-ga-label="cancel"> Cancel </button> </div> </form> </div> </div> <div id="citation-manager-action-panel" class="citation-manager-action-panel action-panel" aria-hidden="true"> <div class="inner-wrap"> <h2 class="action-panel-heading"> Create a file for external citation management software </h2> <form id="citation-manager-action-panel-form" class="action-panel-content action-form" action="/results-export-ids/" data-by-search-action="/results-export-search-data/" data-by-ids-action="/results-export-ids/" method="post" data-by-search-method="post" data-by-ids-method="post"> <input type="hidden" name="csrfmiddlewaretoken" value="p4pDIShh3q4PSVMHFGmGp4N4bgwPiZPPS0oztv73Crkli3U6XvW6qGSdB4TCIY0i"> <input name="results-format" type="hidden" value="pubmed"/> <div class="action-panel-actions"> <button class="action-panel-submit" type="submit" data-loading-label="Sending..." data-ga-category="save_share" data-ga-action="citation_manager" data-ga-label="save"> Create file </button> <button class="action-panel-cancel" aria-label="Close 'Send citations to citation manager' panel" ref="linksrc=close_citation_manager_panel" aria-controls="citation-manager-action-panel" aria-expanded="false" data-ga-category="save_share" data-ga-action="citation_manager" data-ga-label="cancel"> Cancel </button> </div> </form> </div> </div> <div id="rss-action-panel" class="rss-action-panel action-panel " aria-hidden="true"> <div class="inner-wrap"> <h2 class="action-panel-heading"> Your RSS Feed </h2> <form id="rss-action-panel-form" class="rss-action-panel-form action-panel-content action-form" data-create-rss-feed-url="/create-rss-feed-url/" data-search-form-term-value=""> <input type="hidden" name="csrfmiddlewaretoken" value="p4pDIShh3q4PSVMHFGmGp4N4bgwPiZPPS0oztv73Crkli3U6XvW6qGSdB4TCIY0i"> <div class="action-panel-control-wrap"> <label for="rss-name" class="action-panel-label required-field-asterisk"> Name of RSS Feed: </label> <input maxlength="200" placeholder="Name" type="text" name="rss-name" id="rss-name" class="rss-name" value='' required pattern="[^"&=<>\/]*" title="The following characters are not allowed in the Name field: "&=<>/"> </div> <div class="rss-limit-wrap"> <div class="action-panel-control-wrap action-panel-extra-margin-top"> <label for="rss-limit" class="action-panel-label"> Number of items displayed: </label> <select id="rss-limit" class="no-border-panel-selector rss-limit"> <option value="5">5</option> <option value="10">10</option> <option value="15" selected="selected">15</option> <option value="20">20</option> <option value="50">50</option> <option value="100">100</option> </select> </div> </div> <div class="action-panel-actions"> <button class="action-panel-submit" type="submit" data-loading-label="Creating..." data-ga-category="save_share" data-ga-action="alert" data-ga-label="save"> Create RSS </button> <button class="action-panel-cancel" aria-label="Close 'Your RSS' panel" ref="linksrc=close_rss_panel" aria-controls="rss-action-panel" aria-expanded="false" data-ga-category="save_share" data-ga-action="alert" data-ga-label="cancel"> Cancel </button> </div> <div class="action-panel-control-wrap rss-link-copy-wrap"> <label for="rss-link" class="usa-sr-only">RSS Link</label> <input placeholder="Your RSS Feed Link" type="text" name="rss-link" id="rss-link" class="rss-link" title="RSS Link"> <button type="button" disabled class="rss-link-copy-button disabled" data-ga-category="save_share" data-ga-action="rss" data-ga-label="copy"> Copy </button> </div> </form> </div> </div> </div> </div> <div class="article-page" id="article-page" data-article-pmid="33793460"> <aside class="page-sidebar"> <div class="inner-wrap"> <div class="full-text-links"> <div class="full-view"> <h3 class="title"> Full text links </h3> <div class="full-text-links-list"> <a class="link-item dialog-focus" href="https://doi.org/10.15585/mmwr.mm7013e3" target="_blank" rel="noopener" ref="linksrc=fulltextorjournal_fulltext&is_pmc=False&PrId=4503&itool=Abstract-def&log$=linkouticon&uid=33793460&db=pubmed&nlmid=7802429" title="See full text options at CDC - Morbidity and Mortality Weekly Report" data-ga-category="full_text" data-ga-action="CDC - Morbidity and Mortality Weekly Report" data-ga-label="33793460" ><img src="https://cdn.ncbi.nlm.nih.gov/corehtml/query/egifs/https:--www.cdc.gov-mmwr-images-nlmbutton.gif" alt="full text provider logo"><span class="text"> CDC - Morbidity and Mortality Weekly Report </span></a><a class="link-item pmc " href="https://pmc.ncbi.nlm.nih.gov/articles/pmid/33793460/" target="_blank" rel="noopener" ref="linksrc=fulltextorjournal_fulltext&is_pmc=True&PrId=3494&itool=Abstract-def&log$=linkouticon&uid=33793460&db=pubmed&nlmid=7802429" title="Free full text at PubMed Central" data-ga-category="full_text" data-ga-action="PMC" data-ga-label="33793460" ><span 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data-ga-label="collections_button" data-collections-open-dialog-enabled="false" data-collections-open-dialog-url="https://account.ncbi.nlm.nih.gov/?back_url=https%3A%2F%2Fpubmed.ncbi.nlm.nih.gov%2F33793460%2F%23open-collections-dialog" data-in-collections="false"><span class="button-label">Collections</span></button><div class="overlay" role="dialog"><div id="collections-action-dialog" class="dialog collections-dialog" aria-hidden="true"><div class="title">Add to Collections</div><div class="collections-action-panel action-panel"><form id="collections-action-dialog-form" class="collections-action-panel-form action-panel-content action-form action-panel-smaller-selectors" data-existing-collections-url="/list-existing-collections/" data-add-to-existing-collection-url="/add-to-existing-collection/" data-create-and-add-to-new-collection-url="/create-and-add-to-new-collection/" data-myncbi-max-collection-name-length="100" data-collections-root-url="https://www.ncbi.nlm.nih.gov/myncbi/collections/"><input type="hidden" name="csrfmiddlewaretoken" value="p4pDIShh3q4PSVMHFGmGp4N4bgwPiZPPS0oztv73Crkli3U6XvW6qGSdB4TCIY0i"><div class="choice-group" role="radiogroup"><ul class="radio-group-items"><li><input type="radio" id="collections-action-dialog-new" class="collections-new" name="collections" value="new" data-ga-category="collections_button" data-ga-action="click" data-ga-label="collections_radio_new"><label for="collections-action-dialog-new">Create a new collection</label></li><li><input type="radio" id="collections-action-dialog-existing" class="collections-existing" name="collections" value="existing" checked="true" data-ga-category="collections_button" data-ga-action="click" data-ga-label="collections_radio_existing"><label for="collections-action-dialog-existing">Add to an existing collection</label></li></ul></div><div class="controls-wrapper"><div class="action-panel-control-wrap new-collections-controls"><label for="collections-action-dialog-add-to-new" class="action-panel-label required-field-asterisk"> Name your collection: </label><input type="text" name="add-to-new-collection" id="collections-action-dialog-add-to-new" class="collections-action-add-to-new" pattern="[^"&=<>\/]*" title="The following characters are not allowed in the Name field: "&=<>/" maxlength="100" data-ga-category="collections_button" data-ga-action="create_collection" data-ga-label="non_favorties_collection"><div class="collections-new-name-too-long usa-input-error-message selection-validation-message"> Name must be less than 100 characters </div></div><div class="action-panel-control-wrap existing-collections-controls"><label for="collections-action-dialog-add-to-existing" class="action-panel-label"> Choose a collection: </label><select id="collections-action-dialog-add-to-existing" class="action-panel-selector collections-action-add-to-existing" data-ga-category="collections_button" data-ga-action="select_collection" data-ga-label="($('.collections-action-add-to-existing').val() === 'Favorites') ? 'Favorites' : 'non_favorites_collection'"></select><div class="collections-retry-load-on-error usa-input-error-message selection-validation-message"> Unable to load your collection due to an error<br><a href="#">Please try again</a></div></div></div><div class="action-panel-actions"><button class="action-panel-submit" type="submit" data-loading-label="Adding..." data-pinger-ignore data-ga-category="collections_button" data-ga-action="click" data-ga-label="add"> Add </button><button class="action-panel-cancel" aria-label="Close 'Add to Collections' panel" ref="linksrc=close_collections_panel" aria-controls="collections-action-panel" aria-expanded="false" data-ga-category="collections_button" data-ga-action="click" data-ga-label="cancel"> Cancel </button></div></form></div></div></div></div><button class="more-actions-button more-actions-dialog-trigger" title="Open dialog with more actions to take" ref="linksrc=more_actions_btn"></button><div class="display-options" 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<div class="short-view" id="short-view-heading"> <h1 class="heading-title"> Interim Estimates of Vaccine Effectiveness of BNT162b2 and mRNA-1273 COVID-19 Vaccines in Preventing SARS-CoV-2 Infection Among Health Care Personnel, First Responders, and Other Essential and Frontline Workers - Eight U.S. Locations, December 2020-March 2021 </h1> <div class="short-citation"> <span class="authors-list"> <span class="authors-list-item "><span class="full-name">Mark G Thompson</span><span class="citation-separator"> et al.</span></span> </span> <span class="citation-journal"> MMWR Morb Mortal Wkly Rep<span class="citation-separator">.</span> </span> <span class="date"> <time class="citation-year" datetime="2021">2021</time><span class="citation-separator">.</span> </span> </div> <div class="more-article-details-section with-display-settings"> <button class="more-article-details" id="toggle-article-details" data-alt-text="Hide details" ref="linksrc=toggle_article_details" 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Morbidity and mortality weekly report"><div class="title">Actions</div><div class="content"><ul class="journal-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link" href="/?term=%22MMWR+Morb+Mortal+Wkly+Rep%22%5Bjour%5D&sort=date&sort_order=desc" data-href="/?term=%22MMWR+Morb+Mortal+Wkly+Rep%22%5Bjour%5D&sort=date&sort_order=desc" ref="linksrc=search_in_pubmed_journal_name_link&journal_abbrev=MMWR Morb Mortal Wkly Rep" data-ga-category="search" data-ga-action="journal_link" data-ga-label="MMWR Morb Mortal Wkly Rep"> Search in PubMed </a></li><li><a class="search-in-nlm-catalog-link dropdown-block-link" ref ="linksrc=search_in_nlm_catalog_link" href="https://www.ncbi.nlm.nih.gov/nlmcatalog?term=%22MMWR+Morb+Mortal+Wkly+Rep%22%5BTitle+Abbreviation%5D" data-ga-category="search_catalog" data-ga-action="journal_link" data-ga-label="MMWR Morb Mortal Wkly Rep"> Search in NLM Catalog </a></li><li><a class="add-to-search-link dropdown-block-link" ref 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data-ga-action="author_link" data-ga-label="Jefferey L Burgess">Jefferey L Burgess</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Naleway+AL&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Allison L Naleway">Allison L Naleway</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Tyner+HL&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Harmony L Tyner">Harmony L Tyner</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Yoon+SK&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Sarang K Yoon">Sarang K Yoon</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Meece+J&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Jennifer Meece">Jennifer Meece</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Olsho+LEW&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Lauren E W Olsho">Lauren E W Olsho</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Caban-Martinez+AJ&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Alberto J Caban-Martinez">Alberto J Caban-Martinez</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Fowlkes+A&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Ashley Fowlkes">Ashley Fowlkes</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Lutrick+K&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Karen Lutrick">Karen Lutrick</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Kuntz+JL&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Jennifer L Kuntz">Jennifer L Kuntz</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Dunnigan+K&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Kayan Dunnigan">Kayan Dunnigan</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Odean+MJ&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Marilyn J Odean">Marilyn J Odean</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Hegmann+KT&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Kurt T Hegmann">Kurt T Hegmann</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Stefanski+E&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Elisha Stefanski">Elisha Stefanski</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Edwards+LJ&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Laura J Edwards">Laura J Edwards</a><span class="comma">, </span></span><span class="authors-list-item "><a 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data-ga-label="Holly C Groom">Holly C Groom</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Zunie+T&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Tnelda Zunie">Tnelda Zunie</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Thiese+MS&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Matthew S Thiese">Matthew S Thiese</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Ivacic+L&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Lynn Ivacic">Lynn Ivacic</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Wesley+MG&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Meredith G Wesley">Meredith G Wesley</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Lamberte+JM&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Julie Mayo Lamberte">Julie Mayo Lamberte</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Sun+X&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Xiaoxiao Sun">Xiaoxiao Sun</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Smith+ME&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Michael E Smith">Michael E Smith</a><span class="comma">, </span></span><span 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data-ga-label="Joe Gerald">Joe Gerald</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Brown+RT&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Rachel T Brown">Rachel T Brown</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Herring+MK&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Meghan K Herring">Meghan K Herring</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Joseph+G&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Gregory Joseph">Gregory Joseph</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Beitel+S&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Shawn Beitel">Shawn Beitel</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Morrill+TC&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Tyler C Morrill">Tyler C Morrill</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Mak+J&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Josephine Mak">Josephine Mak</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Rivers+P&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Patrick Rivers">Patrick Rivers</a><span class="comma">, </span></span><span class="authors-list-item 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Kutty">Preeta Kutty</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Fry+AM&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Alicia M Fry">Alicia M Fry</a><span class="comma">, </span></span><span class="authors-list-item "><a class="full-name" href="/?term=Gaglani+M&cauthor_id=33793460" ref="linksrc=author_name_link" data-ga-category="search" data-ga-action="author_link" data-ga-label="Manjusha Gaglani">Manjusha Gaglani</a></span> </div> </div> </div> <ul class="identifiers" id="short-view-identifiers"> <li> <span class="identifier pubmed"> <span class="id-label"> PMID: </span> <strong class="current-id" title="PubMed ID">33793460</strong> </span> </li> <li> <span class="identifier pmc"> <span class="id-label"> PMCID: </span> <a class="id-link" target="_blank" rel="noopener" ref="linksrc=article_id_link&article_id=PMC8022879&id_type=PMC" href="https://pmc.ncbi.nlm.nih.gov/articles/PMC8022879/" data-ga-category="full_text" data-ga-action="PMCID" > PMC8022879 </a> </span> </li> <li> <span class="identifier doi"> <span class="id-label"> DOI: </span> <a class="id-link" target="_blank" rel="noopener" ref="linksrc=article_id_link&article_id=10.15585/mmwr.mm7013e3&id_type=DOI" href="https://doi.org/10.15585/mmwr.mm7013e3" data-ga-category="full_text" data-ga-action="DOI" > 10.15585/mmwr.mm7013e3 </a> </span> </li> </ul> <div class="in-clipboard-label " hidden> Item in Clipboard </div> </div> </div> </header> <div class="actions-buttons inline"><div class="inner-wrap"><button class="full-text-links-button full-text-links-dialog-trigger" title="Open dialog with full text links" ref="linksrc=full_text_links"> Full text links </button><button class="citation-button citation-dialog-trigger" aria-label="Open dialog with citation text in different styles" data-ga-category="save_share" data-ga-action="cite" data-ga-label="open" data-all-citations-url="/33793460/citations/" data-citation-style="nlm" data-pubmed-format-link="/33793460/export/"><span class="button-label">Cite</span></button><button class="more-actions-button more-actions-dialog-trigger" title="Open dialog with more actions to take" ref="linksrc=more_actions_btn"></button><div class="display-options" data-format-key="format" data-default-format-value="abstract" data-current-format-value="abstract" role="region"><button class="trigger usa-button" title="Change format" data-ga-category="display_options" data-ga-action="display_options_dialog"><span class="button-label">Display options</span></button><div class="dropdown" hidden><div class="title"> Display options </div><div class="content"><div class="format-container"><span class="option-label"> Format </span><select name="format" data-initial-value="abstract" aria-label="Display format" id="inline-actions-display-format"><option value="abstract">Abstract</option><option value="pubmed">PubMed</option><option value="pmid">PMID</option></select></div></div></div></div></div></div> <div class="abstract" id="abstract"> <h2 class="title"> Abstract </h2> <div class="abstract-content selected" id="eng-abstract"> <p> Messenger RNA (mRNA) BNT162b2 (Pfizer-BioNTech) and mRNA-1273 (Moderna) COVID-19 vaccines have been shown to be effective in preventing symptomatic COVID-19 in randomized placebo-controlled Phase III trials (1,2); however, the benefits of these vaccines for preventing asymptomatic and symptomatic SARS-CoV-2 (the virus that causes COVID-19) infection, particularly when administered in real-world conditions, is less well understood. Using prospective cohorts of health care personnel, first responders, and other essential and frontline workers* in eight U.S. locations during December 14, 2020-March 13, 2021, CDC routinely tested for SARS-CoV-2 infections every week regardless of symptom status and at the onset of symptoms consistent with COVID-19-associated illness. Among 3,950 participants with no previous laboratory documentation of SARS-CoV-2 infection, 2,479 (62.8%) received both recommended mRNA doses and 477 (12.1%) received only one dose of mRNA vaccine.<sup>†</sup> Among unvaccinated participants, 1.38 SARS-CoV-2 infections were confirmed by reverse transcription-polymerase chain reaction (RT-PCR) per 1,000 person-days.<sup>§</sup> In contrast, among fully immunized (≥14 days after second dose) persons, 0.04 infections per 1,000 person-days were reported, and among partially immunized (≥14 days after first dose and before second dose) persons, 0.19 infections per 1,000 person-days were reported. Estimated mRNA vaccine effectiveness for prevention of infection, adjusted for study site, was 90% for full immunization and 80% for partial immunization. These findings indicate that authorized mRNA COVID-19 vaccines are effective for preventing SARS-CoV-2 infection, regardless of symptom status, among working-age adults in real-world conditions. COVID-19 vaccination is recommended for all eligible persons. </p> </div> </div> <p class="disclaimer" id="disclaimer"> <a href="/disclaimer/" target="_blank" ga_category="literature_resources" ga_action="disclaimer_link" ga_label="under_abstract">PubMed Disclaimer</a> </p> <div class="conflict-of-interest" id="conflict-of-interest"> <h2 class="title"> Conflict of interest statement </h2> <div class="statement"> <p xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:p1="http://pubmed.gov/pub-one">All authors have completed and submitted the International Committee of Medical Journal Editors form for disclosure of potential conflicts of interest. Allison L. Naleway reported funding from Pfizer for a meningococcal B vaccine study unrelated to the submitted work. Kurt T. Hegmann serves at the Editor of the American College of Occupational and Environmental Medicine’s evidence-based practice guidelines. Matthew S. Thiese reported grants and personal fees from Reed Group and the American College of Occupational and Environmental Medicine, outside the submitted work. No other potential conflicts of interest were disclosed.</p> </div> </div> <div class="linked-articles" id="linked-commentary"> <h2 class="title"> Comment in </h2> <ul class="item-list usa-unstyled-list"> <li class="full-docsum"> <div class="docsum-content" style="display:inline;"> <a class="docsum-title" href="/34525278/" ref="article_id=34525278&linksrc=comments_link" data-ga-category="comment_correction" data-ga-action="abstract_page_link" data-ga-label="linked-commentary"> Effectiveness of an Inactivated SARS-CoV-2 Vaccine. </a> <div class="docsum-citation full-citation"> <span class="docsum-authors full-authors">Okhotin A.</span> <span class="docsum-authors short-authors">Okhotin A.</span> <span class="docsum-journal-citation full-journal-citation">N Engl J Med. 2021 Sep 30;385(14):1336-1337. doi: 10.1056/NEJMc2112423. Epub 2021 Sep 15.</span> <span class="docsum-journal-citation short-journal-citation">N Engl J Med. 2021.</span> <span class="citation-part">PMID: <span class="docsum-pmid">34525278</span></span> <span class="no-abstract spaced-citation-item citation-part">No abstract available.</span> </div> </div> </li> </ul> </div> <div class="similar-articles" id="similar"> <h2 class="title"> Similar articles </h2> <ul class="articles-list" id="similar-articles-list"> <li class="full-docsum"> <div class="docsum-content" style="display:inline;"> <a class="docsum-title" href="/34192428/" ref="article_id=34192428&linksrc=similar_articles_link&ordinalpos=1" data-ga-category="similar_article" data-ga-action="34192428" data-ga-label=""> Prevention and Attenuation of Covid-19 with the BNT162b2 and mRNA-1273 Vaccines. </a> <div class="docsum-citation full-citation"> <span class="docsum-authors full-authors">Thompson MG, Burgess JL, Naleway AL, Tyner H, Yoon SK, Meece J, Olsho LEW, Caban-Martinez AJ, Fowlkes AL, Lutrick K, Groom HC, Dunnigan K, Odean MJ, Hegmann K, Stefanski E, Edwards LJ, Schaefer-Solle N, Grant L, Ellingson K, Kuntz JL, Zunie T, Thiese MS, Ivacic L, Wesley MG, Mayo Lamberte J, Sun X, Smith ME, Phillips AL, Groover KD, Yoo YM, Gerald J, Brown RT, Herring MK, Joseph G, Beitel S, Morrill TC, Mak J, Rivers P, Poe BP, Lynch B, Zhou Y, Zhang J, Kelleher A, Li Y, Dickerson M, Hanson E, Guenther K, Tong S, Bateman A, Reisdorf E, Barnes J, Azziz-Baumgartner E, Hunt DR, Arvay ML, Kutty P, Fry AM, Gaglani M.</span> <span class="docsum-authors short-authors">Thompson MG, et al.</span> <span class="docsum-journal-citation full-journal-citation">N Engl J Med. 2021 Jul 22;385(4):320-329. doi: 10.1056/NEJMoa2107058. 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class="keyword-actions-trigger trigger keyword-link" aria-label="Toggle dropdown menu for keyword BNT162 Vaccine" tabindex="0" aria-controls="keyword-actions-mesh-terms-2" aria-expanded="false" data-pinger-ignore> BNT162 Vaccine </button><div id="keyword-actions-mesh-terms-2" class="keyword-actions-dropdown dropdown dropdown-container" hidden aria-label="Dropdown menu for keyword BNT162 Vaccine"><div class="title">Actions</div><div class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link" href="/?term=%22BNT162+Vaccine%22%5BMeSH%5D&sort=date&sort_order=desc" data-href="/?term=%22BNT162+Vaccine%22%5BMeSH%5D&sort=date&sort_order=desc" ref="linksrc=search_in_pubmed_keyword_link&mesh="BNT162 Vaccine"[MeSH]" data-ga-category="search" data-ga-action="mesh_term" data-ga-label="BNT162 Vaccine"> Search in PubMed </a></li><li><a class="search-in-mesh-link dropdown-block-link" ref="linksrc=search_in_mesh_link" 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class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link" href="/?term=%22COVID-19%2Fepidemiology%22%5BMeSH%5D&sort=date&sort_order=desc" data-href="/?term=%22COVID-19%2Fepidemiology%22%5BMeSH%5D&sort=date&sort_order=desc" ref="linksrc=search_in_pubmed_keyword_link&mesh="COVID-19/epidemiology"[MeSH]" data-ga-category="search" data-ga-action="mesh_term" data-ga-label="COVID-19 / epidemiology"> Search in PubMed </a></li><li><a class="search-in-mesh-link dropdown-block-link" ref="linksrc=search_in_mesh_link" href="https://www.ncbi.nlm.nih.gov/mesh?term=COVID-19" data-ga-category="search_mesh" data-ga-action="mesh_term_link" data-ga-label="COVID-19 / epidemiology"> Search in MeSH </a></li><li><a class="add-to-search-link dropdown-block-link" ref="linksrc=add_to_search_link" role="button" data-search-term=""COVID-19/epidemiology"[MeSH]" data-ga-category="search" data-ga-action="add_to_search" data-ga-label=""COVID-19/epidemiology"[MeSH]" href="#"> Add to Search </a></li></ul></div></div></div></li><li><div class="keyword-actions dropdown-block"><button class="keyword-actions-trigger trigger keyword-link major" aria-label="Toggle dropdown menu for keyword COVID-19 / prevention & control*" tabindex="0" aria-controls="keyword-actions-mesh-terms-major-4" aria-expanded="false" data-pinger-ignore> COVID-19 / prevention & control* </button><div id="keyword-actions-mesh-terms-major-4" class="keyword-actions-dropdown dropdown dropdown-container" hidden aria-label="Dropdown menu for keyword COVID-19 / prevention & control*"><div class="title">Actions</div><div class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link" href="/?term=%22COVID-19%2Fprevention+and+control%22%5BMAJR%5D&sort=date&sort_order=desc" data-href="/?term=%22COVID-19%2Fprevention+and+control%22%5BMAJR%5D&sort=date&sort_order=desc" ref="linksrc=search_in_pubmed_keyword_link&mesh="COVID-19/prevention and control"[MAJR]" data-ga-category="search" data-ga-action="mesh_term" data-ga-label="COVID-19 / prevention & control*"> Search in PubMed </a></li><li><a class="search-in-mesh-link dropdown-block-link" ref="linksrc=search_in_mesh_link" href="https://www.ncbi.nlm.nih.gov/mesh?term=COVID-19" data-ga-category="search_mesh" data-ga-action="mesh_term_link" data-ga-label="COVID-19 / prevention & control*"> Search in MeSH </a></li><li><a class="add-to-search-link dropdown-block-link" ref="linksrc=add_to_search_link" role="button" data-search-term=""COVID-19/prevention and control"[MAJR]" data-ga-category="search" data-ga-action="add_to_search" data-ga-label=""COVID-19/prevention and control"[MAJR]" href="#"> Add to Search </a></li></ul></div></div></div></li><li><div class="keyword-actions dropdown-block"><button class="keyword-actions-trigger trigger keyword-link" aria-label="Toggle dropdown menu for keyword COVID-19 Nucleic Acid Testing" tabindex="0" aria-controls="keyword-actions-mesh-terms-5" aria-expanded="false" data-pinger-ignore> COVID-19 Nucleic Acid Testing </button><div id="keyword-actions-mesh-terms-5" class="keyword-actions-dropdown dropdown dropdown-container" hidden aria-label="Dropdown menu for keyword COVID-19 Nucleic Acid Testing"><div class="title">Actions</div><div class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link" href="/?term=%22COVID-19+Nucleic+Acid+Testing%22%5BMeSH%5D&sort=date&sort_order=desc" data-href="/?term=%22COVID-19+Nucleic+Acid+Testing%22%5BMeSH%5D&sort=date&sort_order=desc" ref="linksrc=search_in_pubmed_keyword_link&mesh="COVID-19 Nucleic Acid Testing"[MeSH]" data-ga-category="search" data-ga-action="mesh_term" data-ga-label="COVID-19 Nucleic Acid Testing"> Search in PubMed </a></li><li><a class="search-in-mesh-link dropdown-block-link" ref="linksrc=search_in_mesh_link" href="https://www.ncbi.nlm.nih.gov/mesh?term=COVID-19+Nucleic+Acid+Testing" data-ga-category="search_mesh" data-ga-action="mesh_term_link" data-ga-label="COVID-19 Nucleic Acid Testing"> Search in MeSH </a></li><li><a class="add-to-search-link dropdown-block-link" ref="linksrc=add_to_search_link" role="button" data-search-term=""COVID-19 Nucleic Acid Testing"[MeSH]" data-ga-category="search" data-ga-action="add_to_search" data-ga-label=""COVID-19 Nucleic Acid Testing"[MeSH]" href="#"> Add to Search </a></li></ul></div></div></div></li><li><div class="keyword-actions dropdown-block"><button class="keyword-actions-trigger trigger keyword-link" aria-label="Toggle dropdown menu for keyword COVID-19 Vaccines / administration & dosage" tabindex="0" aria-controls="keyword-actions-mesh-terms-6" aria-expanded="false" data-pinger-ignore> COVID-19 Vaccines / administration & dosage </button><div id="keyword-actions-mesh-terms-6" class="keyword-actions-dropdown dropdown dropdown-container" hidden aria-label="Dropdown menu for keyword COVID-19 Vaccines / administration & dosage"><div class="title">Actions</div><div class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link" href="/?term=%22COVID-19+Vaccines%2Fadministration+and+dosage%22%5BMeSH%5D&sort=date&sort_order=desc" data-href="/?term=%22COVID-19+Vaccines%2Fadministration+and+dosage%22%5BMeSH%5D&sort=date&sort_order=desc" ref="linksrc=search_in_pubmed_keyword_link&mesh="COVID-19 Vaccines/administration and dosage"[MeSH]" data-ga-category="search" data-ga-action="mesh_term" data-ga-label="COVID-19 Vaccines / administration & dosage"> Search in PubMed </a></li><li><a class="search-in-mesh-link dropdown-block-link" ref="linksrc=search_in_mesh_link" href="https://www.ncbi.nlm.nih.gov/mesh?term=COVID-19+Vaccines" data-ga-category="search_mesh" data-ga-action="mesh_term_link" data-ga-label="COVID-19 Vaccines / administration & dosage"> Search in MeSH </a></li><li><a class="add-to-search-link dropdown-block-link" ref="linksrc=add_to_search_link" role="button" data-search-term=""COVID-19 Vaccines/administration and dosage"[MeSH]" data-ga-category="search" data-ga-action="add_to_search" data-ga-label=""COVID-19 Vaccines/administration and dosage"[MeSH]" href="#"> Add to Search </a></li></ul></div></div></div></li><li><div class="keyword-actions dropdown-block"><button class="keyword-actions-trigger trigger keyword-link major" aria-label="Toggle dropdown menu for keyword COVID-19 Vaccines / immunology*" tabindex="0" aria-controls="keyword-actions-mesh-terms-major-7" aria-expanded="false" data-pinger-ignore> COVID-19 Vaccines / immunology* </button><div id="keyword-actions-mesh-terms-major-7" class="keyword-actions-dropdown dropdown dropdown-container" hidden aria-label="Dropdown menu for keyword COVID-19 Vaccines / immunology*"><div class="title">Actions</div><div class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link" href="/?term=%22COVID-19+Vaccines%2Fimmunology%22%5BMAJR%5D&sort=date&sort_order=desc" data-href="/?term=%22COVID-19+Vaccines%2Fimmunology%22%5BMAJR%5D&sort=date&sort_order=desc" ref="linksrc=search_in_pubmed_keyword_link&mesh="COVID-19 Vaccines/immunology"[MAJR]" data-ga-category="search" data-ga-action="mesh_term" data-ga-label="COVID-19 Vaccines / immunology*"> Search in PubMed </a></li><li><a class="search-in-mesh-link dropdown-block-link" ref="linksrc=search_in_mesh_link" href="https://www.ncbi.nlm.nih.gov/mesh?term=COVID-19+Vaccines" data-ga-category="search_mesh" data-ga-action="mesh_term_link" data-ga-label="COVID-19 Vaccines / immunology*"> Search in MeSH </a></li><li><a class="add-to-search-link dropdown-block-link" ref="linksrc=add_to_search_link" role="button" data-search-term=""COVID-19 Vaccines/immunology"[MAJR]" data-ga-category="search" data-ga-action="add_to_search" data-ga-label=""COVID-19 Vaccines/immunology"[MAJR]" href="#"> Add to Search </a></li></ul></div></div></div></li><li><div class="keyword-actions dropdown-block"><button class="keyword-actions-trigger trigger keyword-link major" aria-label="Toggle dropdown menu for keyword Emergency Responders* / statistics & numerical data" tabindex="0" aria-controls="keyword-actions-mesh-terms-major-8" aria-expanded="false" data-pinger-ignore> Emergency Responders* / statistics & numerical data </button><div id="keyword-actions-mesh-terms-major-8" class="keyword-actions-dropdown dropdown dropdown-container" hidden aria-label="Dropdown menu for keyword Emergency Responders* / statistics & numerical data"><div class="title">Actions</div><div class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link" href="/?term=%22Emergency+Responders%2Fstatistics+and+numerical+data%22%5BMAJR%5D&sort=date&sort_order=desc" data-href="/?term=%22Emergency+Responders%2Fstatistics+and+numerical+data%22%5BMAJR%5D&sort=date&sort_order=desc" ref="linksrc=search_in_pubmed_keyword_link&mesh="Emergency Responders/statistics and numerical data"[MAJR]" data-ga-category="search" data-ga-action="mesh_term" data-ga-label="Emergency Responders* / statistics & numerical data"> Search in PubMed </a></li><li><a class="search-in-mesh-link dropdown-block-link" ref="linksrc=search_in_mesh_link" href="https://www.ncbi.nlm.nih.gov/mesh?term=Emergency+Responders" data-ga-category="search_mesh" data-ga-action="mesh_term_link" data-ga-label="Emergency Responders* / statistics & numerical data"> Search in MeSH </a></li><li><a class="add-to-search-link dropdown-block-link" ref="linksrc=add_to_search_link" role="button" data-search-term=""Emergency Responders/statistics and numerical data"[MAJR]" data-ga-category="search" data-ga-action="add_to_search" data-ga-label=""Emergency Responders/statistics and numerical data"[MAJR]" href="#"> Add to Search </a></li></ul></div></div></div></li><li><div class="keyword-actions dropdown-block"><button class="keyword-actions-trigger trigger keyword-link" aria-label="Toggle dropdown menu for keyword Female" tabindex="0" aria-controls="keyword-actions-mesh-terms-9" aria-expanded="false" data-pinger-ignore> Female </button><div id="keyword-actions-mesh-terms-9" class="keyword-actions-dropdown dropdown dropdown-container" hidden aria-label="Dropdown menu for keyword Female"><div class="title">Actions</div><div class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link" href="/?term=%22Female%22%5BMeSH%5D&sort=date&sort_order=desc" data-href="/?term=%22Female%22%5BMeSH%5D&sort=date&sort_order=desc" ref="linksrc=search_in_pubmed_keyword_link&mesh="Female"[MeSH]" data-ga-category="search" data-ga-action="mesh_term" data-ga-label="Female"> Search in PubMed </a></li><li><a class="search-in-mesh-link dropdown-block-link" ref="linksrc=search_in_mesh_link" href="https://www.ncbi.nlm.nih.gov/mesh?term=Female" data-ga-category="search_mesh" data-ga-action="mesh_term_link" data-ga-label="Female"> Search in MeSH </a></li><li><a class="add-to-search-link dropdown-block-link" ref="linksrc=add_to_search_link" role="button" data-search-term=""Female"[MeSH]" data-ga-category="search" data-ga-action="add_to_search" data-ga-label=""Female"[MeSH]" href="#"> Add to Search </a></li></ul></div></div></div></li><li><div class="keyword-actions dropdown-block"><button class="keyword-actions-trigger trigger keyword-link major" aria-label="Toggle dropdown menu for keyword Health Personnel* / statistics & numerical data" tabindex="0" aria-controls="keyword-actions-mesh-terms-major-10" aria-expanded="false" data-pinger-ignore> Health Personnel* / statistics & numerical data </button><div id="keyword-actions-mesh-terms-major-10" class="keyword-actions-dropdown dropdown dropdown-container" hidden aria-label="Dropdown menu for keyword Health Personnel* / statistics & numerical data"><div class="title">Actions</div><div class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link" href="/?term=%22Health+Personnel%2Fstatistics+and+numerical+data%22%5BMAJR%5D&sort=date&sort_order=desc" data-href="/?term=%22Health+Personnel%2Fstatistics+and+numerical+data%22%5BMAJR%5D&sort=date&sort_order=desc" ref="linksrc=search_in_pubmed_keyword_link&mesh="Health Personnel/statistics and numerical data"[MAJR]" data-ga-category="search" data-ga-action="mesh_term" data-ga-label="Health Personnel* / statistics & numerical data"> Search in PubMed </a></li><li><a class="search-in-mesh-link dropdown-block-link" ref="linksrc=search_in_mesh_link" href="https://www.ncbi.nlm.nih.gov/mesh?term=Health+Personnel" data-ga-category="search_mesh" data-ga-action="mesh_term_link" data-ga-label="Health Personnel* / statistics & numerical data"> Search in MeSH </a></li><li><a class="add-to-search-link dropdown-block-link" ref="linksrc=add_to_search_link" role="button" data-search-term=""Health Personnel/statistics and numerical data"[MAJR]" data-ga-category="search" data-ga-action="add_to_search" data-ga-label=""Health Personnel/statistics and numerical data"[MAJR]" href="#"> Add to Search </a></li></ul></div></div></div></li><li><div class="keyword-actions dropdown-block"><button class="keyword-actions-trigger trigger keyword-link" aria-label="Toggle dropdown menu for keyword Humans" tabindex="0" aria-controls="keyword-actions-mesh-terms-11" aria-expanded="false" data-pinger-ignore> Humans </button><div id="keyword-actions-mesh-terms-11" class="keyword-actions-dropdown dropdown dropdown-container" hidden aria-label="Dropdown menu for keyword Humans"><div class="title">Actions</div><div class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link" href="/?term=%22Humans%22%5BMeSH%5D&sort=date&sort_order=desc" data-href="/?term=%22Humans%22%5BMeSH%5D&sort=date&sort_order=desc" ref="linksrc=search_in_pubmed_keyword_link&mesh="Humans"[MeSH]" data-ga-category="search" data-ga-action="mesh_term" data-ga-label="Humans"> Search in PubMed </a></li><li><a class="search-in-mesh-link dropdown-block-link" ref="linksrc=search_in_mesh_link" href="https://www.ncbi.nlm.nih.gov/mesh?term=Humans" data-ga-category="search_mesh" data-ga-action="mesh_term_link" data-ga-label="Humans"> Search in MeSH </a></li><li><a class="add-to-search-link dropdown-block-link" ref="linksrc=add_to_search_link" role="button" data-search-term=""Humans"[MeSH]" data-ga-category="search" data-ga-action="add_to_search" data-ga-label=""Humans"[MeSH]" href="#"> Add to Search </a></li></ul></div></div></div></li><li><div class="keyword-actions dropdown-block"><button class="keyword-actions-trigger trigger keyword-link" aria-label="Toggle dropdown menu for keyword Male" tabindex="0" aria-controls="keyword-actions-mesh-terms-12" aria-expanded="false" data-pinger-ignore> Male </button><div id="keyword-actions-mesh-terms-12" class="keyword-actions-dropdown dropdown dropdown-container" hidden aria-label="Dropdown menu for keyword Male"><div class="title">Actions</div><div class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link" href="/?term=%22Male%22%5BMeSH%5D&sort=date&sort_order=desc" data-href="/?term=%22Male%22%5BMeSH%5D&sort=date&sort_order=desc" ref="linksrc=search_in_pubmed_keyword_link&mesh="Male"[MeSH]" data-ga-category="search" data-ga-action="mesh_term" data-ga-label="Male"> Search in PubMed </a></li><li><a class="search-in-mesh-link dropdown-block-link" ref="linksrc=search_in_mesh_link" href="https://www.ncbi.nlm.nih.gov/mesh?term=Male" data-ga-category="search_mesh" data-ga-action="mesh_term_link" data-ga-label="Male"> Search in MeSH </a></li><li><a class="add-to-search-link dropdown-block-link" ref="linksrc=add_to_search_link" role="button" data-search-term=""Male"[MeSH]" data-ga-category="search" data-ga-action="add_to_search" data-ga-label=""Male"[MeSH]" href="#"> Add to Search </a></li></ul></div></div></div></li><li><div class="keyword-actions dropdown-block"><button class="keyword-actions-trigger trigger keyword-link" aria-label="Toggle dropdown menu for keyword Middle Aged" tabindex="0" aria-controls="keyword-actions-mesh-terms-13" aria-expanded="false" data-pinger-ignore> Middle Aged </button><div id="keyword-actions-mesh-terms-13" class="keyword-actions-dropdown dropdown dropdown-container" hidden aria-label="Dropdown menu for keyword Middle Aged"><div class="title">Actions</div><div class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link" href="/?term=%22Middle+Aged%22%5BMeSH%5D&sort=date&sort_order=desc" data-href="/?term=%22Middle+Aged%22%5BMeSH%5D&sort=date&sort_order=desc" ref="linksrc=search_in_pubmed_keyword_link&mesh="Middle Aged"[MeSH]" data-ga-category="search" data-ga-action="mesh_term" data-ga-label="Middle Aged"> Search in PubMed </a></li><li><a class="search-in-mesh-link dropdown-block-link" ref="linksrc=search_in_mesh_link" href="https://www.ncbi.nlm.nih.gov/mesh?term=Middle+Aged" data-ga-category="search_mesh" data-ga-action="mesh_term_link" data-ga-label="Middle Aged"> Search in MeSH </a></li><li><a class="add-to-search-link dropdown-block-link" ref="linksrc=add_to_search_link" role="button" data-search-term=""Middle Aged"[MeSH]" data-ga-category="search" data-ga-action="add_to_search" data-ga-label=""Middle Aged"[MeSH]" href="#"> Add to Search </a></li></ul></div></div></div></li><li><div class="keyword-actions dropdown-block"><button class="keyword-actions-trigger trigger keyword-link major" aria-label="Toggle dropdown menu for keyword Occupational Diseases / prevention & control*" tabindex="0" aria-controls="keyword-actions-mesh-terms-major-14" aria-expanded="false" data-pinger-ignore> Occupational Diseases / prevention & control* </button><div id="keyword-actions-mesh-terms-major-14" class="keyword-actions-dropdown dropdown dropdown-container" hidden aria-label="Dropdown menu for keyword Occupational Diseases / prevention & control*"><div class="title">Actions</div><div class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link" href="/?term=%22Occupational+Diseases%2Fprevention+and+control%22%5BMAJR%5D&sort=date&sort_order=desc" data-href="/?term=%22Occupational+Diseases%2Fprevention+and+control%22%5BMAJR%5D&sort=date&sort_order=desc" ref="linksrc=search_in_pubmed_keyword_link&mesh="Occupational Diseases/prevention and control"[MAJR]" data-ga-category="search" data-ga-action="mesh_term" data-ga-label="Occupational Diseases / prevention & control*"> Search in PubMed </a></li><li><a class="search-in-mesh-link dropdown-block-link" ref="linksrc=search_in_mesh_link" href="https://www.ncbi.nlm.nih.gov/mesh?term=Occupational+Diseases" data-ga-category="search_mesh" data-ga-action="mesh_term_link" data-ga-label="Occupational Diseases / prevention & control*"> Search in MeSH </a></li><li><a class="add-to-search-link dropdown-block-link" ref="linksrc=add_to_search_link" role="button" data-search-term=""Occupational Diseases/prevention and control"[MAJR]" data-ga-category="search" data-ga-action="add_to_search" data-ga-label=""Occupational Diseases/prevention and control"[MAJR]" href="#"> Add to Search </a></li></ul></div></div></div></li><li><div class="keyword-actions dropdown-block"><button class="keyword-actions-trigger trigger keyword-link major" aria-label="Toggle dropdown menu for keyword Occupations / classification*" tabindex="0" aria-controls="keyword-actions-mesh-terms-major-15" aria-expanded="false" data-pinger-ignore> Occupations / classification* </button><div id="keyword-actions-mesh-terms-major-15" class="keyword-actions-dropdown dropdown dropdown-container" hidden aria-label="Dropdown menu for keyword Occupations / classification*"><div class="title">Actions</div><div class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link" href="/?term=%22Occupations%2Fclassification%22%5BMAJR%5D&sort=date&sort_order=desc" data-href="/?term=%22Occupations%2Fclassification%22%5BMAJR%5D&sort=date&sort_order=desc" ref="linksrc=search_in_pubmed_keyword_link&mesh="Occupations/classification"[MAJR]" data-ga-category="search" data-ga-action="mesh_term" data-ga-label="Occupations / classification*"> Search in PubMed </a></li><li><a class="search-in-mesh-link dropdown-block-link" ref="linksrc=search_in_mesh_link" href="https://www.ncbi.nlm.nih.gov/mesh?term=Occupations" data-ga-category="search_mesh" data-ga-action="mesh_term_link" data-ga-label="Occupations / classification*"> Search in MeSH </a></li><li><a class="add-to-search-link dropdown-block-link" ref="linksrc=add_to_search_link" role="button" data-search-term=""Occupations/classification"[MAJR]" data-ga-category="search" data-ga-action="add_to_search" data-ga-label=""Occupations/classification"[MAJR]" href="#"> Add to Search </a></li></ul></div></div></div></li><li><div class="keyword-actions dropdown-block"><button class="keyword-actions-trigger trigger keyword-link" aria-label="Toggle dropdown menu for keyword Prospective Studies" tabindex="0" aria-controls="keyword-actions-mesh-terms-16" aria-expanded="false" data-pinger-ignore> Prospective Studies </button><div id="keyword-actions-mesh-terms-16" class="keyword-actions-dropdown dropdown dropdown-container" hidden aria-label="Dropdown menu for keyword Prospective Studies"><div class="title">Actions</div><div class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link" href="/?term=%22Prospective+Studies%22%5BMeSH%5D&sort=date&sort_order=desc" data-href="/?term=%22Prospective+Studies%22%5BMeSH%5D&sort=date&sort_order=desc" 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aria-controls="keyword-actions-mesh-terms-17" aria-expanded="false" data-pinger-ignore> United States / epidemiology </button><div id="keyword-actions-mesh-terms-17" class="keyword-actions-dropdown dropdown dropdown-container" hidden aria-label="Dropdown menu for keyword United States / epidemiology"><div class="title">Actions</div><div class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link" href="/?term=%22United+States%2Fepidemiology%22%5BMeSH%5D&sort=date&sort_order=desc" data-href="/?term=%22United+States%2Fepidemiology%22%5BMeSH%5D&sort=date&sort_order=desc" ref="linksrc=search_in_pubmed_keyword_link&mesh="United States/epidemiology"[MeSH]" data-ga-category="search" data-ga-action="mesh_term" data-ga-label="United States / epidemiology"> Search in PubMed </a></li><li><a class="search-in-mesh-link dropdown-block-link" ref="linksrc=search_in_mesh_link" href="https://www.ncbi.nlm.nih.gov/mesh?term=United+States" 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Interim Estimates of Vaccine Effectiveness of BNT162b2 and mRNA-1273 COVID-19 Vaccines in Preventing SARS-CoV-2 Infection Among Health Care Personnel, First Responders, and Other Essential and Frontline Workers - Eight U.S. Locations, December 2020-March 2021 - PubMed