The number of measles, mumps, and rubella (MMR) vaccines you need depends on your age and circumstances

• Children The CDC recommends that children receive two doses of the MMR vaccine

. The first dose is typically administered between 12 and 15 months of age, and the second dose between 4 and 6 years old

• Students Post-high school students without prior proof of immunity require two doses of the MMR vaccine, with a minimum of 28 days between doses

• Adults Adults born in 1957 or later who do not have evidence of immunity should receive at least one dose of the MMR vaccine

. Certain adults, such as healthcare workers or those at increased risk, may need two doses, separated by at least 28 days

. Individuals born before 1957 are usually considered immune due to the widespread nature of measles before vaccination

• International Travelers Infants aged 6–11 months traveling internationally should have one dose of the MMR vaccine before traveling and then receive two more doses after their first birthday, following the standard vaccination schedule