Therefore, this study evaluated the diagnostic performance of three RATs for SARS-CoV-2, namely the GenBody Influenza/COVID-19 Ag Triple kit, the InstaView COVID-19/Flu Ag Combo kit, and the STANDARDTM Q COVID-19 Ag Test kit, as well as a RAT for FluA/FluB, namely the STANDARDTM Q Influenza A/B Test kit, compared with the performance of rRT-PCR based assays for the simultaneous detection of SARS-CoV-2, FluA, and FluB in appropriately stored NPS samples. This evidence concerns the gene RENBP and influenza.