China
Wuhan University - Department of Radiology
COVID-19; SARS-CoV-2; Negative RT-PCR Result
SARS-CoV-2; COVID-19; hospital staff; asymptomatic; tracing
COVID-19; critical ill; scoring system; antibody; mortality
COVID-19; pneumonia; gastrointestinal symptoms
COVID-19, SARS-CoV-2, Sero-surveillance