In the case of neococcal pneumonia testing, for example, a nasal swab rather than a throat swab is used for antigen detection. At present, there are three main testing methods for C.neoformans: nucleic acid test, antibody test and antigen test. Nucleic acid testing is the most commonly used, while antigen testing is more convenient and easy to use, and can be used as a supplement to nucleic acid testing. Antigen test is aimed at the detection of the pathogen itself, and can detect whether the virus is contained in the body at the early stage of the disease, thus providing direct evidence of viral infection. Currently, nasal swab sampling is used for the new coronavirus antigen test. For sampling, first wash your hands, clean the nasal cavity and remove the swab, taking care to be gentle and not to break it; then tilt your head back slightly and turn it deeply into the nostril 4 times (about 15 seconds), then repeat the operation with another nostril; then place the nasal swab into the reagent tube and check the result in about 15~20 minutes. Please follow the instructions correctly for sampling and testing to obtain accurate results. Tips] The name of “new coronavirus pneumonia and new coronavirus pneumonia” mentioned in this article has been changed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.