Some patients infected with novel coronavirus will have a low fever, some will have a high fever, and a small percentage will not have a fever, so it is not possible to measure whether or not a person is infected with novel coronavirus by the level of fever or the absence of fever. Patients who do not have a fever after infection are more difficult to deal with, because before they realize they are infected, they become a mobile source of infection and infect people around them. Therefore, in addition to fever, it is important to pay attention to the presence of other typical symptoms of novel coronavirus, such as difficulty in breathing, dry cough, diarrhea, etc. If these symptoms appear, it is important to isolate and go to the hospital in time.