Low rate of SARS-CoV-2 incident infection identified by weekly screening PCR in a prospective year-long cohort study.
BackgroundAsymptomatic and pre-symptomatic SARS-CoV-2 infections may contribute to ongoing community transmission, however, the benefit of routine screening of asymptomatic individuals in low-risk populations is unclear.MethodsTo identify SARS-CoV-2 infections 553 seronegative individuals were prospectively followed for 52 weeks.From 4/2020-7/2021,