Measles Vaccination and Disease History Assumptions by Age

Use the table as a guide to help determine the age groups most likely under-immunized against measles.

Current Age, Grade or Year of Birth	Assumptions	Rationale for Assumptions
Age less than 12 months	Not vaccinated; may have maternal antibody.	First dose given at 12-15 months.
Age 12 through 15 months	Probably not yet vaccinated.	First dose given at 12-15 months.
Age 16 months until grade K	Age-appropriately vaccinated with 1 dose.	School and childcare requirement.
Grades K through 6	Two doses of vaccine likely.	School requirement for 2nd dose at entrance to K beginning in 2004.
Born 1979 or later	Two doses of vaccine likely.	School requirement for 2nd dose at 7th grade in 1992 and grades 7-12 in 1996.
Born 1963 - 1978	Possibly 1 dose; however, maybe not with current or optimally efficacious vaccine.	The first effective live-virus vaccine was licensed in 1968.
Born 1957 - 1962	Unlikely to have been vaccinated; possible history of disease.	Older than grade K when live-viruse vaccine licensed.
Born before 1957	Likely history of disease.	Measles disease prevalent during childhood of this age cohort.