Prevention of infectious diseases is mainly through three basic links to take comprehensive measures. 1, good management of infectious sources, early detection of transfer sources to better management, infectious disease reporting system is an important measure for early detection and control of infectious diseases. 2, cut off the transmission route, the main measures include isolation and disinfection, which isolation and include strict isolation, respiratory isolation, digestive isolation, blood and body fluid isolation, contact Isolation, insect isolation, protective isolation. Disinfection is also an important measure to cut off the transmission route.3. Protect the susceptible population, the main measures to protect the susceptible population include both specific and non-specific. Non-specific is mainly to improve nutrition, exercise to improve the standard of living, specific measures to protect the susceptible population is to take the focus of planned vaccination to improve the population’s specific level of immunity.