{"id":8578,"date":"2020-07-30T11:11:39","date_gmt":"2020-07-30T18:11:39","guid":{"rendered":"https:\/\/depts.washington.edu\/pandemicalliance\/?p=8578"},"modified":"2021-04-05T11:12:23","modified_gmt":"2021-04-05T18:12:23","slug":"secondary-attack-rate-of-covid-19-in-household-contacts-systematic-review","status":"publish","type":"post","link":"https:\/\/depts.washington.edu\/pandemicalliance\/2020\/07\/30\/secondary-attack-rate-of-covid-19-in-household-contacts-systematic-review\/","title":{"rendered":"Secondary Attack Rate of COVID-19 in Household Contacts: Systematic Review"},"content":{"rendered":"<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"34\" data-aria-posinset=\"2019\" data-aria-level=\"1\"><span data-contrast=\"auto\">A systematic review (<\/span><span data-contrast=\"auto\">13 articles<\/span><span data-contrast=\"auto\">)\u00a0<\/span><span data-contrast=\"auto\">showed that\u00a0<\/span><span data-contrast=\"auto\">the\u00a0<\/span><span data-contrast=\"auto\">household secondary attac<\/span><span data-contrast=\"auto\">k\u00a0<\/span><span data-contrast=\"auto\">rate<\/span><span data-contrast=\"auto\">\u00a0of COVID-19<\/span><span data-contrast=\"auto\">\u00a0varies widely across countries<\/span><span data-contrast=\"auto\">\u00a0with a range of\u00a0<\/span><span data-contrast=\"auto\">5<\/span><span data-contrast=\"auto\">%<\/span><span data-contrast=\"auto\">&#8211;<\/span><span data-contrast=\"auto\">50<\/span><span data-contrast=\"auto\">%<\/span><span data-contrast=\"auto\">,<\/span><span data-contrast=\"auto\">\u00a0unaffected by confounders such as population of the country, lockdown status and geographic location<\/span><span data-contrast=\"auto\">. The\u00a0<\/span><span data-contrast=\"auto\">s<\/span><span data-contrast=\"auto\">ymptomatic status of the index case\u00a0<\/span><span data-contrast=\"auto\">was strongly associated with the secondary attach rate<\/span><span data-contrast=\"auto\">, with very low transmission probability during<\/span><span data-contrast=\"auto\">\u00a0the<\/span><span data-contrast=\"auto\">\u00a0asymptomatic phase<\/span><span data-contrast=\"auto\">.\u00a0<\/span><span data-contrast=\"auto\">T<\/span><span data-contrast=\"auto\">he review\u00a0<\/span><span data-contrast=\"auto\">suggested greater vulnerability of spouse<\/span><span data-contrast=\"auto\">s<\/span><span data-contrast=\"auto\">\u00a0and\u00a0<\/span><span data-contrast=\"auto\">the\u00a0<\/span><span data-contrast=\"auto\">elderly population\u00a0<\/span><span data-contrast=\"auto\">to\u00a0<\/span><span data-contrast=\"auto\">secondary transmission\u00a0<\/span><span data-contrast=\"auto\">compared to\u00a0<\/span><span data-contrast=\"auto\">other household members.\u00a0<\/span><span data-contrast=\"auto\">Q<\/span><span data-contrast=\"auto\">uarantining<\/span><span data-contrast=\"auto\">\u00a0and isolatio<\/span><span data-contrast=\"auto\">n\u00a0<\/span><span data-contrast=\"auto\">were the\u00a0<\/span><span data-contrast=\"auto\">most effective strategies for prevention<\/span><span data-contrast=\"auto\">.<\/span><span data-ccp-props=\"{&quot;134233279&quot;:true}\">\u00a0<\/span><\/li>\n<\/ul>\n<p><i><span data-contrast=\"none\">Shah et al. (July 2020). Secondary Attack Rate of COVID-19 in Household Contacts: Systematic Review.\u00a0<\/span><\/i><i><span data-contrast=\"none\">QJM<\/span><\/i><i><span data-contrast=\"none\">.<\/span><\/i><i><span data-contrast=\"none\">\u00a0<\/span><\/i><a href=\"https:\/\/doi.org\/10.1093\/qjmed\/hcaa232\"><span data-contrast=\"none\">https:\/\/doi.org\/10.1093\/qjmed\/hcaa232<\/span><\/a><span data-ccp-props=\"{&quot;134233279&quot;:true,&quot;335559685&quot;:720}\">\u00a0<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A systematic review (13 articles)\u00a0showed that\u00a0the\u00a0household secondary attack\u00a0rate\u00a0of COVID-19\u00a0varies widely across countries\u00a0with a range of\u00a05%&#8211;50%,\u00a0unaffected by confounders such as population of the country, lockdown status and geographic location. The\u00a0symptomatic status of the index case\u00a0was strongly associated with the secondary attach rate, with very low transmission probability during\u00a0the\u00a0asymptomatic phase.\u00a0The review\u00a0suggested greater vulnerability of spouses\u00a0and\u00a0the\u00a0elderly population\u00a0to\u00a0secondary transmission\u00a0compared&#8230;<\/p>\n<div><a class=\"more\" href=\"https:\/\/depts.washington.edu\/pandemicalliance\/2020\/07\/30\/secondary-attack-rate-of-covid-19-in-household-contacts-systematic-review\/\">Read more<\/a><\/div>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[6],"tags":[],"topic":[21],"class_list":["post-8578","post","type-post","status-publish","format-standard","hentry","category-article-summary","topic-transmission"],"_links":{"self":[{"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/posts\/8578","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/comments?post=8578"}],"version-history":[{"count":1,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/posts\/8578\/revisions"}],"predecessor-version":[{"id":8579,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/posts\/8578\/revisions\/8579"}],"wp:attachment":[{"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/media?parent=8578"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/categories?post=8578"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/tags?post=8578"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/topic?post=8578"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}