Preventive measures for infectious diseases, including the following: First, you can get vaccinated. Second, maintain good personal and environmental hygiene, and be careful to wash your hands regularly, do not use contaminated towels to wipe your hands, and wash your hands immediately after having touched respiratory secretions, such as sneezing. When sneezing or coughing, you should cover your mouth and nose with a tissue or handkerchief to avoid contaminating others with droplets. Third, you should also pay attention to a balanced diet, moderate exercise, adequate rest, improve immunity, avoid overexertion, pay attention to opening windows and ventilation every day, and try not to go to crowded places with dirty air during the high influenza season. Vaccination before the flu season can also reduce the chance of infection.