Neocoronavirus mostly refers to new coronavirus pneumonia, and it is possible to get back positive after cure, the probability of getting back positive is very small. Cure of new coronavirus refers to two consecutive negative nucleic acid test results, and the interval between the two nucleic acid tests is more than 24 hours. New coronavirus infection after the cure will produce strong IgG antibodies, generally will not re-positive, even if re-positive general new coronavirus nucleic acid amount is relatively low, the virus is only residual in the body, will not be infected to close contacts, and will not cause secondary transmission. Therefore, in order to avoid the new crown after the cure, the new crown patients discharged from the hospital, but also to isolate 14 days, 14 days after the release of isolation to review the nucleic acid test, the discovery of the re-positive cases in a timely manner once again isolated from the treatment, to reduce the chances of contagion. [Tip] This article refers to “new coronary pneumonia, new coronary virus pneumonia”, etc., has been December 26, 2022, the National Health Commission issued a notice to change the name to “new coronary virus infection”.