Measles Resurgence in Canada: How to Protect Your Family—and Your Trip
The reality check
Canada has maintained measles elimination since 1998, but 2025 has brought the largest outbreak since elimination, with cases across multiple provinces. If transmission persists beyond October 2025, Canada risks losing its elimination status—an avoidable setback tied to immunity gaps.
Why measles spreads so fast
Measles is among the most contagious viruses (R₀ ~12–18). Communities generally need 90–95% immunity to prevent sustained spread. When vaccination dips, outbreaks follow—often sparked by travel-related importations.
Consequences beyond the rash
Measles can cause pneumonia, encephalitis, and immune amnesia (long-term suppression of immune memory). There’s no treatment to “undo” these risks—vaccination prevents them.
What to do now
- Verify 2 documented MMR doses for everyone eligible before travel.
- Infants traveling to high-risk destinations may need early dosing—ask us.
- Carry proof of vaccination; some destinations check.
Destinations Travel and Immunization Clinic can validate records, arrange catch-ups, and coordinate with public health if you’ve been exposed. Government of Canada
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Disclaimer: The medical information on this site is provided as an information resource only and is not to be used or relied upon for any diagnostic or treatment purposes. This information does not substitute for professional diagnosis and treatment. Please do not initiate, modify, or discontinue any treatment, medication, or supplement solely based on this information. Always seek the advice of your healthcare provider first. Full Disclaimer.
