Fever is one of the symptoms of the new coronavirus, but fever does not necessarily mean that you are infected with the new coronavirus, so a fever nucleic acid test will not necessarily be positive. There are many different causes of fever, such as the more common common viral cold. Both share the common symptom of fever, but the unique nucleic acid sequences of the pathogens that cause the disease are different. Only the presence of neocoronavirus infection in the body makes it possible to detect the nucleic acid sequence of neocoronavirus from the body and present a positive result. Other causes of fever, such as influenza and bacterial infections, are not affected by the nucleic acid test and are negative. Of course, no matter whether the fever is caused by the new coronavirus infection or not, it is advisable for patients to go to the fever clinic of the hospital for nucleic acid test to confirm whether the fever is caused by the new coronavirus, to clarify the cause of the fever, and to treat the cause of the fever in a timely manner under the guidance of the professional doctor to prevent the fever from remaining unresolved, which may lead to other adverse consequences.