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Measles outbreak

As of Dec. 4, 2025, there have been 22 measles cases in Gallatin County. As a result, both the Gallatin City-County Health Department and MPH recommend an accelerated MMR vaccination schedule for those planning to visit Gallatin County.

Measles
  • Infants ages 6-11 months may receive one dose of MMR.
    • This first dose does not count towards the two primary MMR doses. Children should still receive a dose between 12-15 months (12 months if the child is in an area where the disease is high risk) and the second dose at age 4-6 years.
  • Children 12 months to adults born in 1957 or later should receive two doses of MMR. 28 days must pass before you receive another MMR dose.
  • Adults born in 1957-1968 (special cohort) should receive two doses of MMR.
  • Adults born before 1957 are considered immune for measles.