Disease prevention and control should mainly include controlling the source of infection, cutting off the means of transmission and protecting susceptible people. Control of infectious sources: early detection and reporting of infectious sources, isolation and disinfection of patients, killing, burning or burying of infected animals, and so on. Cutting off the transmission route: such as killing mosquitoes and insects, disinfecting water, disinfecting the environment, disinfecting tableware, treating food at high temperature, wearing masks, paying attention to personal hygiene and cleanliness, and avoiding unclean sexual intercourse. Protection of susceptible people: such as vaccination or injection of immunoglobulin, prophylactic drug administration, physical exercise, regular work and rest, abstaining from smoking and limiting alcohol, and reasonable and balanced diet and nutrition. The specific measures for different diseases are different and should be taken according to the epidemiological characteristics of the disease.