Influenza viruses are RNA viruses. Influenza viruses are divided into three types: A, B, and C. Influenza A viruses often cause pandemics and are more severe; influenza B and C viruses cause epidemics and epidemics and are relatively mild. Influenza viruses are mainly transmitted in the form of droplets through the air from person to person. The main treatment is to isolate patients who are suspected or diagnosed, and to use antiviral drugs as soon as possible within 48 hours of the onset of the disease, which is represented by oseltamivir phosphate in the clinic. For patients with fever, antipyretic and analgesic drugs can be given to alleviate clinical symptoms. Patients should pay attention to rest, drink more water, increase nutrition, and give easy-to-digest food to avoid secondary serious infections and worsening symptoms.