The SARS-CoV-2 antigen rapid test card is a one-step in vitro test based on immunochromatography. It is designed for rapid, high-quality detection of SARS-CoV-2 virus antigen in COPID-19-susceptible nasal swabs during the first seven days after the onset of symptoms. The SARS-CoV-2 antigen rapid test card should not be used as the sole basis for diagnosing or eliminating SARS-CoV-2 infection. Children under 14 need adult help.