Novel pneumonia, or novel coronavirus pneumonia, may not necessarily be novel pneumonia if the fever stays at 37.3°C. It may also be a persistent low-grade fever caused by diseases such as hyperthyroidism, and needs to be diagnosed in conjunction with other symptoms, whether there is a history of exposure, and the results of relevant tests. Patients with novel pneumonia may have fever, dry cough, and malaise as the main manifestations, which may be accompanied by digestive symptoms such as diarrhea, as well as loss of taste and smell, and difficulty breathing. However, none of these symptoms are unique to novel pneumonia, and the diagnosis of infection cannot be based on symptoms alone. A diagnosis of novel pneumonia requires a combination of chest x-rays showing lung lesions, blood tests showing decreased white blood cell count and decreased lymphocyte count, and positive nucleic acid tests. People who have these symptoms, have been to the infected area, or have been in contact with someone infected with novel pneumonia should immediately go to a hospital with a fever clinic and have the relevant tests performed. It is important to wear a mask during the visit and avoid public transportation. In addition, some disease states, such as hyperthyroidism, tuberculosis, rheumatic immune diseases, can cause the body’s basal metabolism to accelerate, causing the patient’s body temperature to rise and persistently appear 37.3°C without fever reduction, depending on other symptoms of the disease, such as hyperthyroidism is usually accompanied by agitation, excessive sweating, fear of heat, hyperphagia and other related symptoms. If there is no other symptom but persistent low fever that does not subside, it is considered to be a disorder of the thermoregulatory center, and it is best to seek prompt medical attention to identify the cause.