how often should i get mmr vaccine
Children should get 2 doses of MMR vaccine: 1  The first dose at 12 months through 15 months of age. 2  The second dose at 4 years through 6 years of age. Teenagers and adults born during or after 1957 without evidence of immunity against measles should have documentation of two doses of MMR vaccine, with the second dose administered no earlier than 28 days after the first dose.