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Measles Cases Reach 800 in U.S., Threatening Elimination Status

The outbreak, centered in Texas with 597 cases, highlights falling vaccination rates and resource challenges as Ontario reports 925 cases.

Overview

  • The U.S. has confirmed 800 measles cases across 24 states in 2025, with Texas accounting for 597 cases, according to the CDC.
  • Ontario's outbreak has grown to 925 cases since October, with 69 hospitalizations reported, including unvaccinated children.
  • Ninety-six percent of U.S. measles cases involve unvaccinated individuals or those with unknown vaccination status, underscoring declining MMR uptake.
  • CDC officials warn of underreporting, particularly in West Texas, and cite strained outbreak response due to recent public health funding cuts.
  • Michigan has reported its first measles outbreak since 2019, with seven confirmed cases linked to Ontario's larger outbreak.