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<!DOCTYPE html> <html lang="en-us" class="cdc-2022 theme-blue cdc-root-home home-2022 cdc-page-type-2022home cdc-tp5" > <head> <title>Page Not Found | CDC</title> <meta name="description" content="Page Not Found | CDC" /> <meta name="date" content="2024-05-02T11:44:27.140Z"> <meta charset="UTF-8" /> <meta http-equiv="X-UA-Compatible" content="IE=Edge" /> <meta content="width=device-width, initial-scale=1, shrink-to-fit=no" name="viewport" /> <meta name="mobile-web-app-capable" content="yes" /> <meta name="apple-mobile-web-app-capable" content="yes" /> <link rel="apple-touch-icon" sizes="180x180" href="/TemplatePackage/5.0/img/favicon/apple-touch-icon.png"> <link rel="icon" type="image/png" sizes="32x32" href="/TemplatePackage/5.0/img/favicon/favicon-32x32.png"> <link rel="icon" type="image/png" sizes="16x16" href="/TemplatePackage/5.0/img/favicon/favicon-16x16.png"> <link rel="mask-icon" href="/TemplatePackage/5.0/img/favicon/safari-pinned-tab.svg" color="#0056b3"> <meta name="msapplication-TileColor" content="#0056b3"> <meta name="theme-color" content="#0056b3"> <link rel="stylesheet prefetch" href="/TemplatePackage/5.0/css/app.min.css?_=91329" /> <link rel="stylesheet" media="print" href="/TemplatePackage/5.0/css/print.min.css?_=91329" /> <link rel="manifest" href="/TemplatePackage/5.0/json/manifest.json"> <script src="https://www.cdc.gov/JScript/metrics/topic_levels.js?_=53850"></script> <script src="https://www.cdc.gov/JScript/metrics/adobe/launch/b36c1852e229/2c674008a127/launch-04da70ea688d.min.js?_=53850"></script> <meta property="cdc:template_version" content="5.0" /> </head> <body class="no-js cdc-dfe-cdc_homepage"> <div id="skipmenu"> <a class="visually-hidden-focusable" href="#content">Skip directly to site content</a> <a class="visually-hidden-focusable" href="#cdc-search">Skip directly to search</a> </div> <div class="cdc-page-banner container noindex"> <div class="row cdc-site-gov-notice noindex noprint" aria-label="Official website of the United States government"> <div class="col-lg-11"> <div> <img aria-hidden="true" class="usa-banner__header-flag" src="/TemplatePackage/5.0/img/uswds/us_flag_small.png" alt="U.S. flag" width="16" height="11"> <span>An official website of the United States government</span> </div> <span> <a data-bs-toggle="collapse" href="#gov-notice" role="button" aria-expanded="false" aria-controls="gov-notice"> Here's how you know <span class="cdc-fa-angle-down" aria-hidden="true"></span> </a> </span> </div> <div class="collapse" id="gov-notice" aria-hidden="true"> <div class="row"> <div class="col-12 col-lg-6"> <img src="/TemplatePackage/5.0/img/uswds/icon-dot-gov.svg" alt="" aria-hidden="true"> <div> <b>Official websites use .gov</b> <p>A .gov website belongs to an official government organization in the United States.</p> </div> </div> <div class="col-12 col-lg-6"> <img src="/TemplatePackage/5.0/img/uswds/icon-https.svg" alt="" aria-hidden="true"> <div> <b>Secure .gov websites use HTTPS</b> <p>A <strong>lock</strong> ( <i class="cdc-icon-lock-01" aria-hidden="true"></i> ) or <strong>https://</strong> means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.</p> </div> </div> </div> </div> </div> <div data-cdc-site-alert></div> </div> <header class="container cdc-header noindex" role="banner"> <!-- TP5 SSI: site_header --> <!-- logo, menu, search --> <div class="cdc-header__desktop"> <div class="cdc-page-offset"> <div class="cdc-header__cdc-logo"> <a href="/"> <img src="/TemplatePackage/5.0/img/logo/logo-notext.svg" alt="Centers for Disease Control and Prevention. CDC twenty four seven. Saving Lives, Protecting People" /> </a> </div> <div class="cdc-header__body"> <div class="cdc-header__title"> <a href="/"> Centers for Disease Control and Prevention </a> </div> <div class="cdc-header__components"> <!-- Must Have At Least 3 Pages in Audience or Multiple Audience --> <div class="cdc-header__menu"> </div> <form action="https://search.cdc.gov/search/" method="GET" class="cdc-header__search" role="search"> <a href="#" id="cdc-search__toggle">Search</a> <div class="input-group cdc-header__search__group"> <input class="form-control" data-search-input autocomplete="off" type="search" name="query" id="cdc-search__input" maxlength="300" placeholder="Search"> <button class="btn" type="button" id="cdc-search__clear"><span class="cdc-icon-close"><span class="visually-hidden">Clear Input</span></span></button> <button class="btn" type="submit" id="cdc-search__submit"><span class="cdc-fa-magnifying-glass"><span class="visually-hidden">Search</span></span></button> </div> </form> </div> </div> </div> </div> <div class="cdc-header-mobile"> <div class="cdc-header-mobile__top"> <a href="/"> <img src="/TemplatePackage/5.0/img/logo/cdc-logo-tag-right-alt.svg" class="cdc-logo-mobile" alt="Centers for Disease Control and Prevention. 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normalizedUrl.replace( 'index.htm' , '' ); normalizedUrl = normalizedUrl.replace( 'default.html' , '' ); normalizedUrl = normalizedUrl.replace( 'default.htm' , '' ); normalizedUrl = normalizedUrl.toLowerCase(); if ( -1 === normalizedUrl.indexOf( '.' ) && ! normalizedUrl.endsWith( '/' ) ) { normalizedUrl = normalizedUrl + '/'; } if ( hash && '' !== hash ) { normalizedUrl = normalizedUrl + hash.toLowerCase(); } return normalizedUrl; } $( document ).ready( () => { let movedMappings = []; let siteMappings = []; let archiveMappings = []; let mappingSources = [] mappingSources.push( $.getJSON( '/config/404/404_Mapping.json', ( json ) => { movedMappings = json; } ) ); mappingSources.push( $.getJSON( '/config/404/Site_Mapping.json', ( json ) => { siteMappings = json; } ) ); mappingSources.push( $.getJSON( '/config/404/Archive_Mapping.json', ( json ) => { archiveMappings = json; } ) ); $.when.apply( $, mappingSources ).done( ( e ) => { let requestedUrl = window.location.href; let hasBeenRedirected = requestedUrl.indexOf( '?CDC_AA_refVal=' ) > -1; let normalizedUrl = NormalizeUrl( window.location.pathname, window.location.hash ); let newUrls = movedMappings.filter( t => t.old_url === normalizedUrl ); let siteRenameUrls = siteMappings.filter( t => t.old_url.toLowerCase().replace( 'https://www.cdc.gov', '' ) === normalizedUrl || ( 'https://www.cdc.gov' + normalizedUrl ).startsWith( t.old_url + '/' ) ); let archiveUrls = archiveMappings.filter( t => NormalizeUrl( t.url, null ) === 'https://www.cdc.gov' + NormalizeUrl( window.location.pathname, null ) ); if ( ! hasBeenRedirected && ( newUrls && 0 < newUrls.length ) ) { // Handle redirect option(s)) let oneToMany = false; let firstUrl = newUrls[ 0 ].new_url; newUrls.forEach( ( item ) => { if ( item.new_url !== firstUrl ) { oneToMany = true; } } ); if ( 1 === newUrls.length || ! oneToMany ) { // Do redirect if one match or if all matches point to same target let a = $( '#cdc-one-match p a' ); a.attr( 'href', newUrls[ 0 ].new_url + '?CDC_AAref_Val=' + encodeURI( requestedUrl ) ); a.html( newUrls[ 0 ].title ); window.setTimeout( () => { window.location = newUrls[ 0 ].new_url + '?CDC_AAref_Val=' + encodeURI( requestedUrl ); }, 10000 ); $( '#cdc-default' ).removeClass( 'd-none' ).addClass( 'd-none' ); $( '#cdc-one-match' ).removeClass( 'd-none' ); $( '#cdc-more-than-one-match' ).removeClass( 'd-none' ).addClass( 'd-none' ); $( '#cdc-archive' ).removeClass( 'd-none' ).addClass( 'd-none' ); } else { // Or display list of possible links if more than one let ul = $( '#cdc-more-than-one-match ul' ); newUrls.forEach( ( item ) => { let li = $( '<li />' ); let a = $( '<a />' ); a.html( item.title ); a.attr( 'href', item.new_url + '?CDC_AAref_Val=' + encodeURI( requestedUrl ) ); li.append( a ); ul.append( li ); } ); $( '#cdc-default' ).removeClass( 'd-none' ).addClass( 'd-none' ); $( '#cdc-one-match' ).removeClass( 'd-none' ).addClass( 'd-none' ); $( '#cdc-more-than-one-match' ).removeClass( 'd-none' ); $( 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