The fever caused by influenza virus will clear up in about a week, during which there will be symptoms of recurrent fever. The fever caused by influenza virus is above 39℃, and some people will even reach 40℃. Influenza virus fever is characterized by high fever, and the temperature is relatively high and lasts longer than other types of flu fever. Influenza is highly contagious and especially prone to infectious outbreaks in the autumn and winter seasons. Patients with viral influenza who have cough and phlegm respiratory infections can take oseltamivir, Abidor antiviral oral solution, etc. If the patient also has high fever, they need to use antipyretic suppositories and other antipyretic drugs, and patients with cough and phlegm can consider taking compound licorice tablets. Each patient can take medication under the guidance of a doctor according to different situations. In addition, patients should drink more hot water.