The pandemic of COVID-19 continues to affect much of the world. Knowledge of diagnostic tests for SARS-CoV-2 is still evolving, and a clear understanding of the nature of the tests and interpretation of their findings is important. In this useful Viewpoint, Sethuraman, Jeremiah and Ryo describe how to interpret 2 types of diagnostic tests commonly in use for SARS-CoV-2 infections—reverse transcriptase–polymerase chain reaction (RT-PCR) and IgM and IgG enzyme-linked immunosorbent assay (ELISA)—and how the results may vary over time.
jamanetwork.com/journals/jama/fullarticle/2765837
by Marialuisa Zedde and Francesco Cavallieri