Babies do not need to be vaccinated at 7 months of age if they have all been vaccinated normally according to the requirements before 7 months of age, and they can be vaccinated with leprosy vaccine and live attenuated encephalitis B vaccine at 8 months of age. Planned immunization is a procedure based on the immunity characteristics of pediatrics and the occurrence of infectious diseases. Infants need to complete BCG, polio vaccine, DPT, measles attenuated vaccine, and Hepatitis B virus vaccine within 1 year of age. BCG and Hepatitis B vaccine should be given at birth, followed by Hepatitis B vaccine again at 1 month, Polio vaccine at 2 months, Polio vaccine and DPT at 3 months, Polio vaccine and DPT at 4 months, DPT at 5 months, and Hepatitis B vaccine at 6 months. Vaccination is not required at 7 months, and continued at 8 months with leprosy vaccine and live attenuated encephalitis B vaccine. Infants should be vaccinated on time to be able to control and eliminate infectious diseases and improve the immunization level of the population, pay attention to keeping young children warm, avoiding cold and balanced nutrition.