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Canada Measles Cases Pass 4,500, Highest Count in Americas

Unvaccinated groups and travel exposures fueled Alberta's measles outbreak, with 1,790 cases making it the hardest-hit area per capita, officials said.

  • As of Wednesday, Alberta had 1,790 measles cases and was the hardest-hit province per capita, with updated figures showing more cases this year than the United States.
  • In March, internal documents show cases traced to travellers, the Little Red River Cree Nation, and a Mennonite school, with the outbreak mainly among Anabaptist Christian communities known for historic vaccine hesitancy.
  • In the Calgary zone, the first confirmed case was a nearly two-year-old girl admitted on March 14, and a March 20 email noted six children aged 2 and under were sent for measles testing.
  • By April 11, internal documents show officials in Two Hills considered stopping individual contact tracing and not excluding infected people from public settings; Alberta later expanded vaccination clinics, broadened eligibility, and launched an awareness campaign.
  • WHO data this month show Canada accounts for about half of confirmed measles cases in the Americas, while PAHO reported 18 percent had unknown vaccination status amid vaccine misinformation.
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Canada measles cases pass 4,500, highest count in Americas

Canada's measles case count has passed 4,500, with the western province of Alberta -- which has about five million people -- recording more cases this year than the United States, figures updated Thursday showed.

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The Globe & Mail broke the news in Canada on Thursday, August 21, 2025.
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