Influenza A virus is mainly spread through respiratory droplets. Influenza A is mainly due to the influenza A virus through saliva, droplets through the respiratory tract, but also through the oral cavity, nasal cavity, eyes and other places of the mucous membrane direct or indirect contact to spread. The spread of influenza A is relatively rapid, highly contagious, can cause aggregated infection, should be injected with influenza A vaccine, at the same time, pay attention to wear a mask, keep the environment ventilated, so as to prevent the spread of influenza A. The patient with influenza A should also wear a mask, keep the environment ventilated, so as to prevent the spread of influenza A. At the same time, patients with influenza A, it is best to be able to respiratory isolation treatment, to avoid infecting others. Treatment of influenza A requires the use of antiviral drugs, such as oseltamivir and abidol for treatment, and at the same time, pay attention to drink more water, oral detoxification drugs, the condition can generally be improved. The medication should be administered under the supervision of a doctor.