Clinical validation of quantitative SARS-CoV-2 antigen assays to estimate SARS-CoV-2 viral loads in nasopharyngeal swabs
Expansion of testing capacity for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is an important issue. Recently, a sensitive quantitative antigen test (SQT) was developed. The sensitivity was 91.7% and the specificity was 98.5%. The distribution of negative cases, the 99.5 percentile value was 1.03 pg/ml.

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