{"id":1953,"date":"2020-11-03T13:29:29","date_gmt":"2020-11-03T21:29:29","guid":{"rendered":"https:\/\/depts.washington.edu\/pandemicalliance\/?p=1953"},"modified":"2020-11-04T13:31:47","modified_gmt":"2020-11-04T21:31:47","slug":"sars-cov-2-seroprevalence-and-transmission-risk-factors-among-high-risk-close-contacts-a-retrospective-cohort-study","status":"publish","type":"post","link":"https:\/\/depts.washington.edu\/pandemicalliance\/2020\/11\/03\/sars-cov-2-seroprevalence-and-transmission-risk-factors-among-high-risk-close-contacts-a-retrospective-cohort-study\/","title":{"rendered":"SARS-CoV-2 Seroprevalence and Transmission Risk Factors among High-Risk Close Contacts: A Retrospective Cohort Study"},"content":{"rendered":"<p>A retrospective cohort study of all close contacts of confirmed COVID-19 cases in Singapore (n=7,770) found the attack rate among household contacts (5.9%) was higher compared to work contacts and social contacts (both 1.3%). Among contacts, close physical proximity (sharing a bedroom for household contacts and sharing a vehicle for work and social contacts) and verbal interactions 30 minutes or longer were associated with SARS-CoV-2 transmission. Findings further estimate that a symptom-based PCR-testing strategy missed 62% of COVID-19 diagnoses, and that 36% of individuals with SARS-CoV-2 infection were asymptomatic.<\/p>\n<p><i>Ng et al. (Nov 2, 2020). SARS-CoV-2 Seroprevalence and Transmission Risk Factors among High-Risk Close Contacts: A Retrospective Cohort Study. The Lancet Infectious Diseases. <\/i><a href=\"https:\/\/doi.org\/10.1016\/S1473-3099(20)30833-1\">https:\/\/doi.org\/10.1016\/S1473-3099(20)30833-1<\/a><i><span class=\"Apple-converted-space\">\u00a0<\/span><\/i><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A retrospective cohort study of all close contacts of confirmed COVID-19 cases in Singapore (n=7,770) found the attack rate among household contacts (5.9%) was higher compared to work contacts and social contacts (both 1.3%). Among contacts, close physical proximity (sharing a bedroom for household contacts and sharing a vehicle for work and social contacts) and&#8230;<\/p>\n<div><a class=\"more\" href=\"https:\/\/depts.washington.edu\/pandemicalliance\/2020\/11\/03\/sars-cov-2-seroprevalence-and-transmission-risk-factors-among-high-risk-close-contacts-a-retrospective-cohort-study\/\">Read more<\/a><\/div>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[6],"tags":[38],"topic":[21],"class_list":["post-1953","post","type-post","status-publish","format-standard","hentry","category-article-summary","tag-transmission","topic-transmission"],"_links":{"self":[{"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/posts\/1953","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\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/comments?post=1953"}],"version-history":[{"count":1,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/posts\/1953\/revisions"}],"predecessor-version":[{"id":1954,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/posts\/1953\/revisions\/1954"}],"wp:attachment":[{"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/media?parent=1953"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/categories?post=1953"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/tags?post=1953"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/topic?post=1953"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}