Nucleic acids are generally referred to as neocollagenic nucleic acids, and there are no neocollagenic nucleic acid test strips available, only neocollagenic antigen detection test strips. Antigen detection test paper C is the control group, when there is a clear band at C this test is valid, and then observe the reaction at T. Antigen detection test paper is one of the methods of new crown virus detection, its test paper contains new crown virus antibody, will produce antigen antibody reaction with the new crown virus surface protein. If the test paper shows coloration at the C line and no coloration at the T, the test result is negative. If both the C and T lines are visible, the test result is positive. If only the T-line is colored or colorless and the C-line is not colored, the test result is invalid. Antigen test results are not a substitute for nucleic acid results. Antigen testing is generally used during the acute phase of infection, i.e., when samples are tested within 7 days of the onset of symptoms in a suspected population. Further nucleic acid testing should be performed regardless of whether the antigen test result is positive or negative in the suspected population. If the test result is positive, the patient should be isolated and undergo nucleic acid testing to determine whether the patient has novel coronavirus pneumonia. Note: In this article, the terms “neocoronavirus pneumonia” and “novel coronavirus pneumonia” were renamed to “novel coronavirus infection” on December 26, 2022, as announced by the National Health Commission.