Currently antigenic testing is generally referred to as neocoronavirus antigen testing. A positive two-bar neocoronavirus antigen test provides a preliminary diagnosis of infection with a novel coronavirus, but a false-positive result should also be considered. Neocoronavirus antigen test is a preliminary diagnosis of whether the body is infected with the new coronavirus screening method, normal uninfected people should be tested negative, that is, one bar. Therefore, a two-bar positive Neocoronavirus antigen test is not normal and is a preliminary diagnosis of Neocoronavirus infection, and further medical attention is usually required to confirm infection with a Neocoronavirus nucleic acid test. In addition to the above, some of the two positive bars of Neocoronavirus antigen test are considered to be false positives, i.e. caused by factors such as not following the instructions strictly, expiration of the Neocoronavirus antigen test kit, or failure of the test kit. It is worth noting that neocoronavirus antigen test is not a complete substitute for nucleic acid test. It is recommended that the new coronavirus antigen test positive two bar people to avoid excessive panic, should be reported to the community and the CDC department in a timely manner, with the staff to the medical examination, and combined with the history, symptoms and other comprehensive diagnosis of new coronavirus pneumonia. Tips] In this article, “new coronavirus pneumonia” and “new coronavirus pneumonia” have been renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.