Currently, the new crown nucleic acid test needs to be operated by regular medical personnel in a P3 laboratory, and cannot be operated at home by oneself. Nucleic acid test is the basis for the diagnosis of new crown virus infection, nucleic acid is the main genetic material of the virus, positive nucleic acid test indicates the presence of the virus in the body, clinical PCR is often used in the detection method, commonly used for nasal swabs or pharyngeal swabs, the actual test should be carried out in the regular health care personnel in the prescribed P3 laboratory operation, not at home to operate on their own. Specific testing laboratories should be carried out in qualified laboratories issued by local CDC departments and relevant departments such as the New Crown Pneumonia Epidemic Leadership Group, and should not carry out relevant testing behaviors without authorization, as well as avoiding relevant operations at home by themselves. At present, the main way to test for neocoronavirus on your own is antigen testing, which can be done at home by yourself. Do new crown nucleic acid test 2 hours before try to avoid eating, so as not to cause vomiting; 30 minutes before sampling to do not drink water and beverages, smoking, alcohol, chewing gum, etc.; clinical examination to reduce the swallowing action, do not do throat clearing (coughing, spitting) action. You should leave the collection site immediately after the test and avoid spitting and vomiting around the collection site. Tip: “New coronavirus pneumonia and new coronavirus pneumonia” mentioned in this article were renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.