Newly crowned infected patients who are re-positive may still be infectious and need to continue to be isolated for observation or treatment. Returning positive, or repositive positive, is basically defined as a positive nucleic acid test after a patient with neococcal pneumonia has met the criteria for discharge from the hospital. A person with neococcal infection who is repositively positive cannot be ruled out as still being infectious. The principle of nucleic acid testing is to look for fragments of the new coronavirus in the sample, and when they are found, the sample will be recognized as positive. However, it is not possible to determine directly whether the neocollins are still active, i.e. whether they can cause transmission. Therefore, in the case of a re-positive sample, there is no confirmation of further transmission, and the infected person will need to be kept in isolation for observation, and will need to go through a process of re-testing and expert verification. It is recommended that during the epidemic, it is still necessary to pay attention to personal protection, the science of wearing masks, maintaining social distance, diligent hand washing. [Tip] This article refers to “new coronavirus pneumonia, new coronavirus pneumonia”, etc., has been December 26, 2022, the National Health Commission issued a notice to change the name to “new coronavirus infection”.