Changes in body temperature are not a criterion for the diagnosis of novel coronavirus pneumonia. The diagnostic criteria are a history of epidemiology, i.e., travel to an infected area or high prevalence area and exposure to an infected person. If there is no epidemiological history at all, other causes of fever should be considered if there is no history of exposure. If one has been in contact with an infected person, or is a close contact of an infected person, or has been to an infected area and develops a fever, there is a high suspicion of possible infection. The most common symptoms after a novel coronavirus pneumonia infection are fever and cough. Therefore, if you have both of these symptoms and an epidemiological history, be sure to ask your doctor to evaluate the possibility of infection and, if necessary, to do a chest CT and a nucleic acid test of a throat swab. There are actually various causes of fever. For adolescents and middle-aged people, a fever of 37.4°C may be caused by infection, but infection is still most common in the common cold, which is also a low-grade fever accompanied by cough and sore throat, and must be judged comprehensively. Content source: Dr. You Lai