Clinical prevention of the spread of bacterial infections is mainly prevented by controlling the source of infection, protecting susceptible populations, and cutting off transmission routes, as follows: I. Protection of susceptible populations: More exercise is needed to enhance physical fitness. For susceptible people, such as infants and young children, the elderly, or the weak and chronically ill, pay attention to personal protection and reduce the number of places where people gather. Indoor ventilation, to develop good habits of hand washing before meals, after the toilet. Second, cut off the transmission route: pay attention to diet, food should be washed before eating, try not to eat raw food, for the existence of bacterial infection to give treatment, and try to isolate with others, to reduce the chances of others being infected. Health care workers working in the hospital should pay attention to aseptic operations to prevent bacterial infections in the hospital. Third, control the source of infection: If it is multi-drug resistant bacteria infection or other infectious bacteria, you need to actively treat the infected patients and isolation.