Effective ways to prevent influenza in children include: getting vaccinated, washing hands frequently, going to less crowded places, keeping indoor air fresh, and strengthening physical exercise. 1. Vaccination: Influenza is a highly contagious respiratory disease caused by the influenza virus, which can cause fever, cough and loss of appetite. Vaccination is the most effective way to prevent influenza in children, and the vaccine is usually effective for about one year, after which it is necessary to be re-injected. 2. Wash your hands frequently: Because children like to touch everywhere, there is a great chance that their hands will be contaminated with viruses, which can survive for several hours on their hands. Therefore, it is necessary to cultivate children’s good hygiene habits, especially when going out and coming home, washing hands before and after meals, to reduce the chances of infection of germs. 3. Go to less crowded places: Because children’s immunity is low and their resistance to influenza viruses is poor, they have a greater chance of being infected with the virus. Therefore, in the flu epidemic period, should avoid taking children to crowded places to gather, and go out must wear a mask, masks can effectively reduce the child’s exposure to airborne pathogens. 4. Keep indoor air fresh: fresh flowing air can reduce the density of germs. Open the windows often, in favor of strengthening indoor air circulation, keep the air fresh, so as to reduce the chances of children’s influenza. 5. Strengthen physical exercise: children should be encouraged to do more outdoor sports, such as badminton, basketball, jogging, etc., can effectively improve the body’s resistance to viral invasion. When the child has flu symptoms, he or she needs to seek medical treatment in time.