After receiving the MMR vaccine, you should eat light, easily digestible supplements that are less likely to cause an allergic reaction. MMR vaccine is a vaccine used to prevent measles, rubella and mumps viruses in infants and children. After receiving MMR vaccine, infants and young children may have adverse reactions such as localized skin rashes and mild fever. At this time, care should be taken to avoid food allergy reaction when adding supplemental food for infants and young children, and light and easy-to-digest pureed vegetables and fruits can be added as supplemental food. It is also not recommended to add foods that have not been eaten before to infants after vaccination, because if infants are allergic to this food, diarrhea, rash and other discomforts, it is not easy to distinguish them from the adverse reactions after vaccination. At the same time, pay attention to keep infants and children warm, hydration, moderate amount of warm water to promote metabolism, avoid cold.