Measles Vaccination and Disease History Assumptions by Age
Use
the table to help determine which populations may be more susceptible to
measles.
| Age
less than 12 months | Unvaccinated;
if mother is immune, protection from maternal antibody through at least early
infancy | MMR
first given at 12-15 months |
| Age
12 through 15 months | May
not yet have 1st dose of MMR | MMR
first given at 12-15 months |
| Age
16 months until entering Kindergarten | If
attending licensed child care, at least 1 dose of MMR likely | Child
care requirement |
Born
after 1986 and has attended school between
K-12 in California | Two
doses of measles vaccine likely | Since
1999, school requirement for 2nd dose of MMR before 7th grade. Since 1997,
school requirement for 2nd dose of MMR before Kindergarten. |
Born
1972 -1986 and attended school between
K-12 in California | At
least one dose of measles vaccine likely | High
immunization rates reported for school requirements of 1st dose |
| Born 1957 - 1971 | At
least 1 dose of measles vaccine or history of measles disease possible; a small
percentage received an ineffective inactivated vaccine between 1963-1968 | Lower
immunization rates reported for students; measles vaccines available in US since 1963 |
| Born
before 1957 in the US or before 1970 in another country | Likely
history of measles disease | Serological
testing of cohort shows nearly all are immune; infection was common before
measles vaccine became available |