Repeat testing with a rapid antigen test may be required to rule out SARS-CoV-2 infection

A prospective cohort study has found that repeat testing in 48-hour intervals with a rapid antigen test (Ag-RDT) may be required to rule out SARS-CoV-2 infection. This means that people testing for SARS-CoV-2 should exercise caution in public settings despite an initial negative result if they suspect they may be infected or have been exposed. The findings are published in Annals of Internal Medicine.