The MMR vaccine is a live attenuated vaccine that can prevent measles, mumps, rubella and other diseases. MMR is a triple vaccine, which can prevent measles, mumps, rubella and other diseases, and is a live attenuated vaccine. The basic immunization is usually the first dose after 8 months of age, the second dose is at 18~24 months of age, if you need a booster shot, a shot can be, vaccination time is recommended to consult the vaccination point physician. Most of the adverse reactions will be pain at the injection site within 24 hours, and some patients have mild fever, rash, and loss of appetite. Rarely, allergic rash and anaphylaxis may occur. Contraindications: allergic to the components contained in the vaccine and the excipients, macromycin; the body has an acute disease, or a serious chronic disease, the exacerbation of chronic disease; and fever patients, women in pregnancy immunodeficiency, immunocompromised patients. MMR vaccine is part of the national program of immunization, and should be given to school-age children in time.