Neocoronavirus is a Category B infectious disease, but as of mid-December 2022, it is still managed as a Category A infectious disease. Novel coronavirus pneumonia, referred to as neocoronavirus, is an acute respiratory infectious disease, which is a Category B infectious disease, but it is managed as a Category A infectious disease because it is extremely contagious and poses a great danger to the organism and society. The main clinical manifestations of new coronavirus infection are fever, dry cough and fatigue, nasal congestion, runny nose and other cold-like symptoms, and when the condition is serious, respiratory difficulties will occur, and even endanger the patient’s life. In order to avoid the new crown virus infection, daily life need to pay attention to protection, go out wearing a mask, the unvaccinated are recommended to receive the new crown vaccine in a timely manner. Tips] The “new coronavirus pneumonia, new coronavirus pneumonia” mentioned in this article has been renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.