Alliance for Pandemic Preparedness

June 19, 2020

Severe Acute Respiratory Syndrome Coronavirus 2 among Asymptomatic Workers Screened for Work Resumption, China

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  • Among 29,299 workers in Wuhan, China who were screened for SARS-CoV-2 by PCR prior to returning to work, 18 (0.061%) were positive, all of whom were asymptomatic. Of the 18 positives, 13 became negative within 8 days, and 41 of their close contacts tested negative. Among 22,633 workers tested for SARS-CoV-2 antibodies, 617 (3%) had positive IgG but negative IgM, 40 (0.2%) had negative IgG but positive IgM, and 196 (0.9%) were positive for both. 

Han et al. (Sept 2020). Severe Acute Respiratory Syndrome Coronavirus 2 among Asymptomatic Workers Screened for Work Resumption, China. Emerging Infectious Diseases. https://doi.org/10.3201/eid2609.201848