Prospective Cohort to Assess Novel and Repeated SARS-CoV-2 Infection and COVID-19 Illness within a US State or Region

We enroll and actively survey a longitudinal cohort of SARS-CoV-2 seropositive and seronegative frontline workers to study the incidence, predictors, and consequences of infection and reinfection. Funding Source:Centers for Disease Control and Prevention