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Measles Outbreaks Escalate Across North America and the UK

Public health responses intensify as cases surpass 4,000 globally, with fatalities reported in the U.S., Mexico, and Canada.

A sign reading "measles testing" is seen as an outbreak in Gaines County, Texas, has raised concerns over its spread to other parts of the state, in Seminole, Texas, U.S., February 25, 2025. REUTERS/Sebastian Rocandio/File Photo
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Instructions for a Measles vaccination is seen outside of the Lubbock Public Health facility on April 09, 2025 in Lubbock, Texas.
Middle age senior hispanic woman over isolated background feeling unwell and coughing as symptom for cold or bronchitis. Healthcare concept.

Overview

  • The United States has confirmed 1,046 measles cases across 30 states in 2025, including three deaths among unvaccinated individuals.
  • Canada has recorded over 2,000 cases this year, with Ontario and Alberta as hotspots; Alberta has issued a standing exposure advisory for its South Zone.
  • Mexico reports over 1,000 cases, with four fatalities, primarily in border regions; local outreach to vaccine-hesitant communities is underway.
  • The UK’s Salford region has confirmed local transmission, prompting officials to urge residents to verify their MMR vaccination status.
  • Falling vaccination rates and misinformation have weakened herd immunity, leaving infants, immunocompromised individuals, and unvaccinated adults at heightened risk.