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How effective is this vaccine?
Post-licensure studies have demonstrated one dose
of MMR vaccine is 78% (range, 45%–97%) effective
for prevention of mumps. Two doses of MMR are
about 88% effective in preventing mumps.
Which adolescents and adults should receive the
MMR vaccine?
All unvaccinated adolescents without a valid contra-
indication to the vaccine should have documentation
of two doses of MMR. All adults born in or after
1957 should also have documentation of vaccination
or other evidence of immunity.
Adults born before 1957 are likely to have had measles
and/or mumps disease as a child and are generally
(but not always) considered not to need vaccination.
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