Serial (repeat) testing is when one person tests themselves multiple times for SARS-CoV-2, influenza A, and influenza B on a routine basis, such as every day or every other day. By testing more frequently, you may detect SARS-CoV-2, influenza A, and influenza B more quickly and reduce the spread of infection. Please see the Warnings and Precautions, and Serial Testing section for the recommended testing frequency for symptomatic individuals that are negative for SARS-CoV-2 on the first day of testing, even if they are positive for influenza A and/or B. Serial (repeat) testing is needed to improve test accuracy for SARS-CoV-2.