Influenza A virus is transmitted mainly through droplet transmission and airborne transmission. If the amount of virus in the environment reaches a certain level, influenza A virus can be inhaled and infected. Generally, after the symptoms appear, the patient will have a sore throat and a runny nose, headache, general muscle aches, and weakness. If you have a fever, you should go to a regular medical institution for treatment. If necessary, take blood tests to see if the white blood cells, lymphocytes and neutrophils are normal. If there is an elevation, especially in lymphocytes, it is considered to be caused by a virus, which is also called influenza. The general treatment is to take oral antiviral drugs such as oseltamivir, and oral antiviral solution of Chinese medicine, and pay attention to rest, do not stay up late and tired. Usually after 1-2 weeks of rest and treatment, the patient will be cured and improve.