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U.S. Measles Cases Hit 1,319, Highest Since 1992, as Local Outbreaks Persist

Health agencies are broadening advisories in response to a rebound that has pushed nationwide cases to 1,319, with concentrated clusters in Michigan’s Kent County alongside a 30-case outbreak in Nova Scotia’s northern zone.

A dose of the measles, mumps, and rubella (MMR) vaccination awaits the next patient during a vaccine clinic in St. Thomas, Ont., on Tuesday, March 4, 2025. THE CANADIAN PRESS/Geoff Robins
Nova Scotia Public Health confirmed 30 total cases of measles in the Northern Zone on Thursday.
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Dr. James Talbot, former chief medical officer of health and public health physician

Overview

  • The CDC reported 1,319 confirmed measles cases across 39 states as of July 24, marking the highest U.S. tally since 1992.
  • Unvaccinated individuals or those with unknown immunization status account for 92 percent of cases this year.
  • Michigan has recorded 18 cases statewide, including four in Kent County after two new infections were announced July 23.
  • Nova Scotia’s northern health zone has reached 30 cases, eight of which are lab-confirmed, though officials say the general public risk remains low.
  • Southwestern Public Health in Ontario reported its first week without new measles cases since spring, even as other provinces continue weekly additions.