Stringent COVID-19 control measures were imposed in Wuhan between January 23 and April 8, 2020. Estimates of the prevalence of infection following the release of restrictions could inform post-lockdown pandemic management. Here, we describe a city-wide SARS-CoV-2 nucleic acid screening programme between May 14 and June 1, 2020 in Wuhan. All city residents aged six years or older were eligible and 9,899,828 (92.9%) participated. No new symptomatic cases and 300 asymptomatic cases (detection rate 0.303/10,000, 95% CI 0.270–0.339/10,000) were identified. There were no positive tests amongst 1,174 close contacts of asymptomatic cases. 107 of 34,424 previously recovered COVID-19 patients tested positive again (re-positive rate 0.31%, 95% CI 0.423–0.574%). The prevalence of SARS-CoV-2 infection in Wuhan was therefore very low five to eight weeks after the end of lockdown. Large-scale population screening can provide insights to levels of ongoing SARS-CoV-2 transmission. Here, the authors report a citywide screening of ~10,000,000 residents of Wuhan and show that SARS-CoV-2 infection prevalence was very low five to eight weeks after the end of lockdown.
【저자키워드】 SARS-CoV-2, Epidemiology, Population screening, 【초록키워드】 COVID-19, pandemic, lockdown, SARS-COV-2 infection, Infection, Prevalence, SARS-CoV-2 transmission, Asymptomatic, management, Wuhan, Asymptomatic case, estimate, detection rate, close contact, Older, 95% CI, measure, SARS-CoV-2 nucleic acid, Positive test, symptomatic case, positive, FIVE, recovered COVID-19 patient, tested, eight, eligible, participated, 【제목키워드】 SARS-CoV-2 nucleic acid, Wuhan, China,