Nucleic acid self-test kits refers to new crown antigen test kits, the test results over 15 minutes may be accurate or wrong, due to the different types of new crown antigen test products, the test results time will be different. Some of the new crown antigen test kits more than 15 minutes may be reading errors, some of the new crown self-test kits more than 15 minutes the results are still correct, due to each new crown antigen test kits are not the same detection efficiency, so the specific still depends on the type of new crown antigen test kits and the instructions of the use of the new crown antigen test kits. The new crown antigen test kit is mainly based on nasopharyngeal swabs, oropharyngeal swabs sampling test, it is recommended to ensure that the samples are clean during the test, in the reading of the results of the time need to be controlled in the drop of the samples in the effective time to read, so as to avoid invalid or inaccurate results. If there is a new crown antigen reading time more than 15 minutes, not sure whether the results are accurate, it is recommended to repeat the test in a timely manner to avoid missing infected people, resulting in the spread of the virus.