Before and after the MMR vaccination, babies should pay attention to the baby’s life management, close observation after vaccination and careful care of the vaccination site. 1. Life management: before and after vaccination, it is not advisable to carry out strenuous activities and take proper rest. Eat light and easy-to-digest food, drink plenty of warm water and pay attention to keeping warm. 2. Close observation after vaccination: After vaccination, you should stay in the vaccination unit for 30 minutes to observe the baby’s reaction and leave only if there is no abnormality. Individual babies may develop fever or rash after vaccination, but the symptoms usually subside within 2 days. If the discomfort is serious, you should go to the hospital for consultation. 3. Careful care of the vaccination site: most babies do not have obvious local reactions after vaccination, but a few babies will feel a short period of burning and tingling at the vaccination site, etc. When the symptoms are mild, there is no need for special treatment, and the site of the vaccination will not be in contact with water for 3 days. If the discomfort is more serious, consider using magnesium sulfate wet compress to reduce the burning and stinging sensation. If your baby develops fever or rash after MMR vaccination, it is recommended to consult a doctor in time and do not self-medicate.