'The combination test correctly identified 99 percent of negative and 90 percent of positive flu A samples, according to the F.D.A. It also detected 100 percent of the negative and 88 percent of the positive Covid samples. The agency said it expected the company to continue to test on the flu B strain, which was not prevalent this year.'

https://www.nytimes.com/2023/02/24/health/covid-flu-test-fda.html?action=click&module=Well&pgtype=Homepage&section=Health