Ongoing Transmission Triggers Loss of Status
Canada has officially lost its measles elimination status, the country’s health agency confirmed. The Pan American Health Organization (PAHO) determined that measles had been spreading continuously for more than 12 months, exceeding the criteria for elimination. The outbreak, which began in late 2024, has led to over 5,000 reported cases across multiple provinces and territories. This development also affects the Americas region, as elimination in all member states is required to maintain regional measles‑free status.
Declining Vaccination Rates Fuel the Outbreak
Health authorities attribute the resurgence to declining vaccination coverage, vaccine hesitancy, and clusters of under‑immunised populations. In 2024, Canada’s two‑dose measles vaccination rate dropped to approximately 79 percent, below the 95 percent threshold needed for herd immunity. Certain rural and religious communities with historically low vaccine uptake have been disproportionately affected, highlighting gaps in access and acceptance.
Public Health Measures Aim to Restore Status
The Public Health Agency of Canada (PHAC) is working with provinces, territories, and PAHO to increase immunisation efforts, strengthen disease surveillance, and interrupt measles transmission for at least 12 months to regain elimination status. Experts stress that while the setback is serious, it is reversible with sustained public health initiatives. Officials continue to emphasize that the best protection against measles remains completing the two‑dose MMR vaccine schedule and ensuring outreach to vulnerable communities.
