Influenza A is generally a type A influenza virus, and the main preventive measures are influenza vaccination and cutting off the means of transmission. Influenza A virus is a common respiratory infectious disease, mild patients may only have mild symptoms of upper respiratory tract infection, heavy patients may experience respiratory failure, multiple organ insufficiency. Influenza vaccination is effective in preventing influenza virus infection, and can be given before the high season of influenza A virus, or during an outbreak. In addition to the influenza vaccination, it is important to wash your hands regularly, minimize visits to places where people gather, wear a mask when you go out, pay attention to indoor air circulation, and increase clothing in a timely manner. In addition, it is necessary to ensure adequate sleep, appropriate exercise, balanced diet to improve the body’s ability to fight the virus, and those who have flu-like symptoms should seek medical attention in a timely manner.