Evaluation of Abbott BinaxNOW Rapid Antigen Test for SARS-CoV-2 Infection

Sensitivity of the BinaxNOW antigen test, compared with polymerase chain reaction testing, was lower when used to test specimens from asymptomatic (35.8%) than from symptomatic (64.2%) persons, but specificity was high. Sensitivity was higher for culture-positive specimens (92.6% and 78.6% for those from symptomatic and asymptomatic persons, respectively); however, some antigen test-negative specimens had culturable virus.

https://www.cdc.gov/mmwr/volumes/70/wr/mm7003e3.htm?s_cid=mm7003e3_w