Extended Data Fig. 1: The level of IgG and IgM antibodies against SARS-CoV-2 antigens by regions and settings.
From: Seroprevalence of immunoglobulin M and G antibodies against SARS-CoV-2 in China
Each dot represents the level of IgG (red) or IgM (blue) antibody for an individual. Antibody levels were expressed as the ratio of the chemiluminescence signal over the cutoff value (S/CO). The dotted line is the cutoff value of antibody level (S/CO=1). Hospital settings included health care workers, hemodialysis patients, and outpatients. Community settings included staff from the designated hotels for healthcare workers, healthcare worker relatives, residential community, and factory worker.
