Fig. 2From: Prevalence of IgM and IgG antibodies to SARS-CoV-2 in health care workers at a tertiary care New York hospital during the Spring COVID-19 surgeSeroconversion IgM and IgG change over time among PCR-confirmed + and − COVID-19 patients. Antibody levels (measured in reflectance light units) were measured in remnant-sample blood from patients with confirmed COVID-19 PCR-positive (a, b) and PCR-negative (c, d) test resultsBack to article page