Interpreting Diagnostic Tests for SARS-CoV-2

This Viewpoint describes how to interpret 2 types of diagnostic tests commonly in use for SARS-CoV-2 infection: reverse transcriptase–polymerase chain reaction (RT-PCR) and IgM and IgG enzyme-linked immunosorbent assay (ELISA), and how the results may vary over time.

Journal of the American Medical Association