People experiencing homelessness are at elevated risk of SARS-CoV-2 infection. yet estimates generally exclude re-infections and rely on data sources affected by testing policies or study timing. In this prospective cohort study. we report incidence of SARS-CoV-2 infection and re-infections over time using a combination of community-based and study-administered testing. https://www.roneverhart.com/HGST-Ultrastar-7K6000-HUS726040ALS214-4TB-7-2K-RPM-SAS-12Gb-s-512n-128MB-3-5-SE-Hard-Drive/