Estimated prevalence and viral transmissibility in subjects with asymptomatic SARS-CoV-2 infections in Wuhan, China
2020
The role of subjects with asymptomatic SARS-CoV-2 infection in the current pandemic is not well-defined Based on two different approaches to estimate the culminative attack rate (seroprevalence of antibodies against SARS-CoV-2, and a four compartment mathematical model) and the reported number of COVID-19 patients, the ratio of asymptomatic versus symptomatic SARS-CoV-2 infection was estimated to be 7 (95% CI: 2 8–12 4) in Wuhan, Hubei, China, the first epicenter of this pandemic, which has settled with no new cases Together with detailed recording of the contact sources in a cohort of patients, and applying the estimations to an established mathematical model, the viral transmissibility of the subjects with asymptomatic SARS-CoV-2 infection is around 10% of the symptomatic patients (95% CI: 7 6%–12 3%) Public policies measures/policies should address this important pool of infectious source in our combat of this viral pandemic
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