Preventing influenza can be done by washing hands frequently, maintaining air circulation, and strengthening physical exercise. 1. Wash your hands frequently and do not share towels, cups and other household items to prevent contact and spread of influenza viruses. Offices and school classrooms should be ventilated frequently to reduce the number of bacteria and viruses gathering indoors and to keep indoor air fresh. 2. Avoid going to public places such as movie theaters and other crowded places during the epidemic. If you go to the hospital, it is best to wear a mask, which can effectively block bacteria and viruses. 3. Increase or decrease clothing appropriately according to temperature changes to prevent virus infection due to low immunity caused by catching cold. Drink plenty of water, get enough sleep, avoid overwork, and strengthen physical exercise to enhance body resistance. Positive and effective preventive measures can effectively reduce the probability of influenza infection.