The MMR vaccine belongs to China’s Class I vaccine and must be administered to children of the appropriate age who meet the conditions for vaccination. MMR vaccine is a combined vaccine used to prevent measles, mumps and rubella, which are common acute respiratory infections in infants and young children, and the MMR vaccine can greatly reduce the incidence of the disease and play a better preventive health care role. At the same time, this vaccine is also a national class I vaccine, which is required to be vaccinated. Contraindications to MMR vaccination include allergy to the active ingredients of the vaccine, severe organic diseases such as heart, liver and kidney diseases, immunodeficiency, active disease, neuralgia and other diseases. Adverse reactions such as pain at the vaccination site, scattered skin rashes and mild fever may occur after MMR vaccination, which usually subside within a few days.