Performance of Repeat BinaxNOW Severe Acute Respiratory Syndrome Coronavirus 2 Antigen Testing in a Community Setting, Wisconsin, November 2020-December 2020

Repeating the BinaxNOW antigen test for severe acute respiratory syndrome coronavirus 2 using 2 groups of readers within 30 minutes resulted in high concordance (98.9%) in 2110 encounters. Same-day repeat antigen testing did not significantly improve test sensitivity (77.2% to 81.4%) while specificity remained high (99.6%).

Automated summary

Repeat BinaxNOW antigen testing using 2 groups of readers within 30 minutes showed high concordance (98.9%) in 2110 encounters, with same-day repeat tests not significantly improving sensitivity (77.2% to 81.4%), while maintaining high specificity (99.6%).