Relapse may also occur after a new crown-positive conversion. A relapse is when a patient with an infectious disease enters recovery and the symptoms have stabilized for a period of time, but due to various reasons, such as a decrease in the patient’s immunity, the corresponding clinical symptoms reappear. After recovery, patients with neococcal pneumonia will produce antibodies against neococcal virus in their bodies. Generally, there is no recurrence, but there is a possibility of recurrence if the patient’s immunity is reduced due to massive blood loss, fatigue or other reasons. Or if the patient comes into contact with someone infected with another strain of neocoronavirus, this may also lead to reinfection. In order to avoid recurrence of new coronavirus pneumonia, recovering patients should also actively take epidemic prevention measures in their daily lives, wear masks, wash their hands frequently, try not to go to crowded places, fever should seek medical attention in time, cough, headache and so on. [Tips] 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 “new coronary virus infection”.