Fig. 1: The cumulative seropositive rates of IgM and IgG antibodies to SARS-CoV-2 antigens in 242 patients with COVID-19.
From: Seroprevalence of immunoglobulin M and G antibodies against SARS-CoV-2 in China
All patients were confirmed by the RT–PCR test for SARS-CoV-2 RNA. One blood sample within 28 d after the onset of symptoms was collected from each patient and tested for IgM and IgG antibodies against SARS-CoV-2. Each serological observation was treated as interval censored, and the cumulative seropositive rates were calculated using Turnbull’s method. The dotted lines indicate 95% CIs of the estimates.
