Figure 1

Seropositivity among participants with a PCR-confirmed infection at the 2022 health physical, by serology assay type (n = 219). For Abbott Alinity SARS-CoV-2 IgG assay, positive results included those in grayzone. PCR positive dates were reported by HCW participants with PCR tests done either at JUH or other medical facilities. “Months” in the figure means “complete months” between PCR positive date and blood sample collection date.