Children should receie the MMR (measles, mumps and rubella) series of 2 shots with 1 gien between 12 and 15 months, and 1 between 4 and 6 years.

• 儿童应注射MMR（麻疹、腮腺炎和风疹）系列疫苗，第1针疫苗在12至15月大的时候注射，第2针在4至6岁注射。