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%).

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8135465PMC
http://dx.doi.org/10.1093/cid/ciab309DOI Listing

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