False antigen positives are generally false positives of the Neocoronavirus antigen test and have a small chance of being misdiagnosed, usually 1% to 5%. Neocoronavirus antigen test refers to the detection of the antigen of the virus with an antibody, allowing the virus to show up, so as to determine whether or not a neocoronavirus infection has occurred. According to the standard of the new coronavirus antigen test reagent approved by the state for marketing, it is required to achieve 95%~99% antigen specificity for detecting the virus. That is to say, among 100 people who do not have the disease, there may be 95~99 people whose antigen test is really negative, and 1~5 people may be judged positive, that is, false-positive, and its misdiagnosis rate is 1%~5%. The probability of false-positive antigen misdiagnosis is small, but because the new crown antigen test may also lead to false-negative results, it can not be used to diagnose the new crown virus infection, antigen-positive patients, you still need to carry out the new crown virus nucleic acid testing, nucleic acid testing is the gold standard for the confirmation of the diagnosis of the new crown virus infection. Antigen testing can be used as a complementary tool for screening of specific populations, facilitating early detection of neocoronavirus-positive cases.