Antigen testing is the detection of the antigen of a virus, generally referred to as neococcal pneumonia virus antigen testing. Current testing methods include antigen testing, nucleic acid testing, and antibody testing. Both antigen testing and nucleic acid testing directly detect the virus. However, compared with nucleic acid testing, antigen testing is more convenient and takes less time to produce results, usually only about 15 minutes. However, the sensitivity of the antigen test is relatively low, and it cannot be used as a definitive diagnosis, nor can it replace the results of a nucleic acid test. If there are lines at both “C” and “T”, it is a positive result and should be reported to the community immediately, and according to the epidemic prevention regulations, go to the relevant institutions for further nucleic acid testing. Tip: In this article, the terms “new coronavirus pneumonia” and “new coronavirus pneumonia” were renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.