{"id":8525,"date":"2020-07-28T10:40:18","date_gmt":"2020-07-28T17:40:18","guid":{"rendered":"https:\/\/depts.washington.edu\/pandemicalliance\/?p=8525"},"modified":"2021-04-05T10:40:59","modified_gmt":"2021-04-05T17:40:59","slug":"estimation-of-viral-aerosol-emissions-from-simulated-individuals-with-asymptomatic-to-moderate-coronavirus-disease-2019","status":"publish","type":"post","link":"https:\/\/depts.washington.edu\/pandemicalliance\/2020\/07\/28\/estimation-of-viral-aerosol-emissions-from-simulated-individuals-with-asymptomatic-to-moderate-coronavirus-disease-2019\/","title":{"rendered":"Estimation of Viral Aerosol Emissions\u00a0From\u00a0Simulated Individuals\u00a0With\u00a0Asymptomatic to Moderate Coronavirus Disease 2019"},"content":{"rendered":"<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"50\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"auto\">A model<\/span><span data-contrast=\"auto\">ing study<\/span><span data-contrast=\"auto\">\u00a0indicated that\u00a0<\/span><span data-contrast=\"auto\">an individual with COVID-19 who is\u00a0<\/span><span data-contrast=\"auto\">coughing\u00a0<\/span><span data-contrast=\"auto\">or\u00a0<\/span><span data-contrast=\"auto\">breathing normally release<\/span><span data-contrast=\"auto\">s<\/span><span data-contrast=\"auto\">\u00a0large numbers of viruses,\u00a0<\/span><span data-contrast=\"auto\">but\u00a0<\/span><span data-contrast=\"auto\">the estimated infectious risk from an individual with\u00a0<\/span><span data-contrast=\"auto\">a\u00a0<\/span><span data-contrast=\"auto\">typical viral load\u00a0<\/span><span data-contrast=\"auto\">in a space the\u00a0<\/span><span data-contrast=\"auto\">size of a medical<\/span><span data-contrast=\"auto\">\u00a0exam room<\/span><span data-contrast=\"auto\">\u00a0<\/span><span data-contrast=\"auto\">was low.\u00a0<\/span><span data-contrast=\"auto\">Riediker\u00a0and Tsai simulated the release of viruses from individuals with asymptomatic to moderate COVID-1<\/span><span data-contrast=\"auto\">9<\/span><span data-contrast=\"auto\">\u00a0infection during normal breathing and while coughing.<\/span><span data-contrast=\"auto\">\u00a0<\/span><span data-contrast=\"auto\">Viral loads across different droplet sizes produced under various conditions\u00a0<\/span><span data-contrast=\"auto\">were derived from literature<\/span><span data-contrast=\"auto\">.\u00a0<\/span><span data-contrast=\"auto\">The authors applied a compartmental model to estimate virus load in a perfectly mixed 50m<\/span><span data-contrast=\"auto\">3<\/span><span data-contrast=\"auto\">\u00a0room with\u00a0<\/span><span data-contrast=\"auto\">one\u00a0<\/span><span data-contrast=\"auto\">individual as the source, assuming a virus half<\/span><span data-contrast=\"auto\">&#8211;<\/span><span data-contrast=\"auto\">life of 1.1 hours, under normal breathing and with coughing every 30 seconds.\u00a0<\/span><span data-contrast=\"auto\">Concentration plateau<\/span><span data-contrast=\"auto\">ed<\/span><span data-contrast=\"auto\">\u00a0in higher ventilation settings (10 exchanges\/hour) after 30 minutes, versus 70 minutes in lower ventilation settings (3 exchanges\/hour).\u00a0<\/span><span data-ccp-props=\"{&quot;134233279&quot;:true,&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/li>\n<\/ul>\n<p><i><span data-contrast=\"none\">Riediker\u00a0and Tsai. (July 2020). Estimation of Viral Aerosol Emissions\u00a0From\u00a0Simulated Individuals\u00a0With\u00a0Asymptomatic to Moderate Coronavirus Disease 2019. JAMA Network Open.\u00a0<\/span><\/i><a href=\"https:\/\/doi.org\/10.1001\/jamanetworkopen.2020.13807\"><span data-contrast=\"none\">https:\/\/doi.org\/10.1001\/jamanetworkopen.2020.13807<\/span><\/a><span data-ccp-props=\"{&quot;134233279&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:720,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A modeling study\u00a0indicated that\u00a0an individual with COVID-19 who is\u00a0coughing\u00a0or\u00a0breathing normally releases\u00a0large numbers of viruses,\u00a0but\u00a0the estimated infectious risk from an individual with\u00a0a\u00a0typical viral load\u00a0in a space the\u00a0size of a medical\u00a0exam room\u00a0was low.\u00a0Riediker\u00a0and Tsai simulated the release of viruses from individuals with asymptomatic to moderate COVID-19\u00a0infection during normal breathing and while coughing.\u00a0Viral loads across different droplet sizes&#8230;<\/p>\n<div><a class=\"more\" href=\"https:\/\/depts.washington.edu\/pandemicalliance\/2020\/07\/28\/estimation-of-viral-aerosol-emissions-from-simulated-individuals-with-asymptomatic-to-moderate-coronavirus-disease-2019\/\">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-8525","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\/8525","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=8525"}],"version-history":[{"count":1,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/posts\/8525\/revisions"}],"predecessor-version":[{"id":8526,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/posts\/8525\/revisions\/8526"}],"wp:attachment":[{"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/media?parent=8525"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/categories?post=8525"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/tags?post=8525"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/topic?post=8525"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}