Mumps Vaccination and Disease History Assumptions by Age

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

Current Age, Grade or Year of Birth	Assumptions	Rationale for Assumptions
Age < 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 moved from grade 7 to K in 2004.
Born 1975 or later	Two doses of vaccine likely.	School requirement for 2nd dose at 7th grade implemented in 1992.
Born 1972 - 1975	Possibly 1 dose.	School requirement for 1 dose; however, mumps exemption in place throughout school years for this age cohort. College requirement for 1 dose of MMR vaccine implemented in 1989 (affecting primarily persons currently under age 35).
Born 1962 - 1971	Possibly 1 dose; however, maybe not with current or optimally efficacious vaccine.	A live virus mumps vaccine was licensed in 1967, but not routinely used until 1977. MMR available in 1971.
Born 1957 - 1961	Unlikely to have been vaccinated; possible history of disease.	Older than grade K when vaccine licensed.
Born before 1957	Likely history of disease.	Mumps disease prevalent during childhood of this age cohort.