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. 2021 Oct 11;105(6):1505–1509. doi: 10.4269/ajtmh.21-0809

Table 2.

Results of the Rapid SARS-CoV-2 antigen assay compared with RT-PCR analysis

Rapid SARS-CoV-2 antigen assay Real-Time RT-PCR assay
Positive Negative Total
Positive 35 3 38
Negative 38 1,024 1,062
Total 73 1,027 1,100
Sensitivity (95% CI) 47.97% (36.10–59.96%)
Specificity (95% CI) 99.71% (99.15–99.94%)

CI = confidence interval; RT-PCR = reverse-transcriptase polymerase chain reaction; SARS-CoV-2 = severe acute respiratory syndrome coronavirus 2.