The measles vaccine is typically given as two doses of the MMR (measles, mumps, rubella) vaccine:
- Children: The first dose is recommended at 12 to 15 months of age, and the second dose at 4 to 6 years of age, before school entry. The second dose can be given earlier if at least 28 days have passed since the first dose
- Infants 6 to 11 months old who are traveling internationally or exposed during outbreaks may receive an early dose, but this does not count as part of the routine two-dose series. They still need two additional doses at the usual ages
- Adults: Most adults born in 1957 or later who have never had measles or been vaccinated should receive at least one dose of MMR vaccine. Some adults, such as healthcare workers, travelers, and students in post-secondary education, may need two doses
- Booster doses: After completing the age-appropriate two-dose series (or one dose for adults when applicable), routine re-immunization or booster doses are generally not necessary, as the vaccine provides long-lasting immunity
In summary, the standard schedule is two doses in childhood, with one or two doses for susceptible adults depending on risk factors, and no routine boosters after that. References:
