Antigen testing, generally referred to as neo-coronavirus antigen testing, is relatively accurate, but less so than nucleic acid testing. For now, the accuracy of an antigen test is measured by the “sensitivity” and “specificity” of the test. The sensitivity of an antigen test refers to the ability to correctly detect a positive test in a population that is actually positive, while the specificity refers to the ability to correctly detect a negative test in a population that is actually negative. The WHO recommends that the sensitivity of an antigen test should not be less than 80% and the specificity should not be less than 97%. The sensitivity and specificity of the antigen kits currently used on the market are still somewhat flawed, and there is still a gap compared to nucleic acid testing. Antigen testing is simple, especially for patients with high viral loads and in the early stages of infection, and is most reliable in settings with ≥5% prevalence of new coronaviruses. Although there is a gap between its accuracy and that of nucleic acid testing, it is easy to perform and is suitable for self-diagnosis in the population.