Cold is a very common clinical disease of the upper respiratory system, and the symptoms of cold can be cough, sneezing, runny nose, and in some cases, fever. Therefore, fever is a common symptom of respiratory tract infections or infectious diseases. Therefore, if a patient has a fever, it does not necessarily mean that it is caused by a novel coronavirus infection. Therefore, if the fever is continuous for 3 days, it can only mean that the inflammatory response is stronger and there are symptoms of fever. However, further tests, including pathogenic tests, are needed as to the cause of the fever. For example, if the patient has a fever due to the common cold, influenza A or influenza B can also manifest itself as a fever for several consecutive days. In this case, a nucleic acid test for novel coronavirus can be performed to determine if the infection is a novel coronavirus. Content source: Dr. You Lai