Nucleic acid test results are generally valid for about 7 days. The results of the nucleic acid test report reflect the presence or absence of neo-coronavirus infection in the human body during this period of time, and also need to be judged based on the presence or absence of symptoms of neo-coronavirus infection and the presence or absence of epidemiological history. The incubation period of the new coronavirus is 1-14 days, usually 3-7 days, and is contagious during the incubation period. Treatment. In addition, in some high-risk areas where the epidemic is severe, the results of the nucleic acid test may be valid for 48 or 72 hours, and patients suspected of having a new coronavirus infection should be retested within 24 hours, so the validity period of the nucleic acid test results varies from case to case, depending on the local policy.