MMR is generally referred to as MMR vaccine, and there is no specific time for the MMR vaccine to be administered. It is usually recommended that the MMR vaccine be administered at 8 months of age or older, depending on the patient’s needs. There is no specified minimum time for the MMR vaccine to be administered, and patients can usually choose when to receive the MMR vaccine according to their own needs. Usually, the MMR vaccine can be given at the age of 8 months or older to prevent the three acute respiratory infections of measles, mumps and rubella. Due to individual constitution, some people may have adverse reactions such as fever, localized lymph node swelling and skin rash after MMR vaccination, which are not contagious and can be relieved by themselves with the progress of time, so there is no need to worry too much. After MMR vaccination, you need to keep the local area clean and dry, and avoid bathing too early to avoid wound infection. At the same time, you need to ensure sufficient rest time, do not overwork or stay up late.