Influenza A virus needs to be quarantined for about 1 week and can go out normally after being cured. Influenza A virus can be transmitted directly or indirectly through the respiratory tract, oral cavity, nasal cavity, eyes and other mucous membranes. According to clinical epidemiologic studies, since, influenza A virus is highly contagious, isolation is required when infected with influenza A virus. Influenza A virus is mainly transmitted by droplet transmission through the respiratory tract, and can also be transmitted through direct or indirect contact with mucous membranes such as the oral cavity, nasal cavity, eyes, etc. Therefore, it is necessary to avoid close contact with other people after becoming ill. In addition, the influenza A virus can be transmitted in the form of aerosols in crowded or closed, airtight environments. The incubation period of this virus is about 1~7 days, with an average of 2~4 days. It is contagious from the incubation period to the acute stage, and is most contagious in the early 2~3 days of illness. Typical symptoms include fever, headache, muscle pain, fatigue and loss of appetite. In summary, when checking the presence of influenza A virus infection need to actively cooperate with the doctor treatment, pay attention to disinfection, strengthen self-management.