Vaccination against measles is used to prevent measles, with initial vaccination at about 8 months of age and a repeat vaccination at about 7 years of age to strengthen the preventive effect. It is also possible to have an initial immunization at 8 months of age and another immunization at 1.5-2 years of age to reduce the number of susceptible individuals who fail the initial immunization. Measles is an acute rash respiratory infection caused by measles virus, which is spread by respiratory secretions and droplets and occurs in children aged 1-5 years. The main symptoms are fever, cough, runny nose, ocular conjunctivitis, and a generalized rash. Mucosal spots of measles are the characteristic manifestation. Especially in young children with low immunity, measles may cause more serious complications and even death. In contrast, vaccination with live attenuated measles vaccine can improve population-specific immunity and reduce the incidence of the disease. The reason why measles vaccination is recommended at 8 months of age is that children before 8 months of age may still carry measles antibodies derived from their mothers, so the risk of contracting measles is extremely low, while thereafter, as they grow older, the antibodies gradually weaken, so the vaccination is needed, and the re-vaccination at 7 years of age is also intended to strengthen the preventive effect. In conclusion, parents are advised to strictly follow the nationally recommended immunization program to vaccinate their children in a timely manner so that measles can be effectively prevented.