Novel coronavirus pneumonia is characterized by fever, malaise, and dry cough, and fever is the main symptom. However, many patients with severe or even critical illness may have no obvious fever or low fever, and many patients with mild illness may have low or no fever. The presence of fever alone is not sufficient to diagnose novel coronavirus pneumonia. In addition to symptoms such as fever, malaise, dry cough, and dyspnea, a combination of history of exposure, CT findings, and results of nucleic acid testing or gene sequencing is an important basis for clinical determination. Many clinical patients may only have diarrhea symptoms, and some may only have dyspnea, or no symptoms. However, a positive test for the virus in the body may make the patient a transmitter of the virus. Content source: Dr. You Lai