A new crown nucleic acid test is a few hours out of date, and if you are traveling, you will need to take another nucleic acid test. Some places require a 48-hour or 24-hour negative nucleic acid certificate for travel. Requirements may also vary from time to time and from place to place. In order to fight the epidemic together and to prevent the occurrence of new crown pneumonia you need to do the nucleic acid test according to your superiors. The nucleic acid test is the diagnostic basis for confirming the diagnosis of the new coronavirus, and is required for people who are suspected of being infected with the new coronavirus. Nucleic acid expired recommendations should be in accordance with the relevant policy requirements for re-testing, to avoid themselves being infected, but also to avoid their own infected infected to others. Tip: In this article, “new coronavirus pneumonia” and “new coronavirus pneumonia” were renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.