Antigen testing generally refers to new crown antigen testing, and nucleic acid testing refers to new crown nucleic acid testing. Positive antigens may have false positives, and nucleic acid testing may not always detect them. Antigen testing involves residents taking a nasal swab of themselves, then breaking the nasal swab, with its head immersed in a sample preservation solution, after which the preservation solution is dripped onto a test strip, and the results can be observed after 15 minutes. False positives may occur in antigen testing, which is performed on human specimens, and the procedure should be strictly adhered to in the instructions. False positives may occur if there is an error in the procedure (e.g., the nasal swab is contaminated with orange juice, etc.). If the antigen test is positive, the test can be retested with a different manufacturer’s antigen test paper and in strict accordance with the instructions, and the community needs to be reported for nucleic acid testing.