A, Sensitivity and (B) specificity of 5 different serological point-of-care devices and 1 commercial enzyme immunoassay compared to SARS-CoV-2 RT-PCR. Error bars represent 95% confidence intervals. Abbreviations: IgA, immunoglobulin A; IgG, immunoglobulin G; RT-PCR, reverse transcription polymerase chain reaction; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2; sVNT, virus neutralization test.