New Crown Positive is not contagious to others immediately after it turns negative, but it cannot be ruled out that the patient may be falsely negative, at which point it is still contagious. In addition, if the patient is cured and then reinfected or re-infected, he/she can still infect others. The new crown mainly refers to the new coronavirus pneumonia, can be transmitted through droplets or contact, the incubation period of 1 ~ 14 days, the patient’s symptoms can be manifested as a dry cough, fever, fatigue, etc., the new crown after the positive conversion of the negative is no longer contagious, so the new crown after the positive conversion of the negative is not contagious, the conversion of the negative that is, on behalf of the clinical cured, do not need to be overly concerned about. However, a small number of patients who have become negative will be re-infected or re-infected, such patients are still infectious. It is recommended to pay attention to personal protection, go out to wear a mask, wash your hands often, and pay attention to rest, and develop a good routine to avoid colds. [Tip] This article refers to the “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 the “new coronary virus infection”.