Fig. 4

Time-to-event curve for time to viral clearance of SARS-CoV-2 in the full analysis population. Shown are cumulative incidence of COVID-19 negative conversion. Viral clearance was defined as conversion of SARS-CoV-2 RNA from positive to negative. There were 6 individuals in the control group with uncertain time of conversion of SARS-CoV-2 RNA from positive to negative. Negative conversion of SARS-CoV-2 was conducted by using Kaplan–Meier method and log-rank-test