Canada Loses Measles-Free Status as US Faces Same Risk

Canada has officially lost its measles-free status after failing to control an outbreak for 12 consecutive months, according to the Pan American Health Organization (Paho). The decision marks a major setback for a country that maintained elimination for nearly three decades.

Paho stated that because Canada no longer qualifies as measles-free, the entire Americas region has lost its elimination status. However, most individual countries in the region remain free of the disease. The United States also faces the same danger if it cannot stop its current outbreak by January. So far, related cases have appeared in Utah, Arizona, and South Carolina.

Canada’s Growing Measles Outbreak

The outbreak began in October 2024 and has been driven by falling vaccination rates. Health authorities report more than 5,000 cases in 2025, with most occurring in Ontario and Alberta. That is three times the number reported in the United States, despite Canada’s smaller population.

Paho Director Dr Jarbas Barbosa called the situation “a setback but reversible.” He urged governments and the public to act swiftly. “To stop measles transmission, at least 95 percent of the population must be vaccinated,” he said.

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Declining Vaccination Rates

The Public Health Agency of Canada said it is working with Paho and regional partners to improve vaccination rates and strengthen data systems. However, several communities remain far below the 95 percent coverage threshold.

In Alberta’s South Zone, near Calgary, only 68 percent of children under two were vaccinated against measles by 2024. Provincial data confirm that low immunisation levels have fueled community spread.

Canadian immunologist Professor Dawn Bowdish of McMaster University said that several factors explain the drop in vaccination. “Many Canadians lack access to family doctors,” she said. “We also do not have a national vaccine registry, and misinformation has spread widely.” She added that public health outreach to hesitant communities has been limited, allowing the problem to grow.

Regaining the Canada Measles-Free Status

Canada can regain its measles-free certification if it halts the current strain’s spread for at least 12 months. The Public Health Agency plans to boost immunisation campaigns and improve record-keeping. In addition, officials are developing targeted awareness programs to reach communities with the lowest vaccination rates.

Dr Barbosa said that losing elimination status should be treated as motivation to strengthen public health systems. “This is a wake-up call,” he noted. “Canada can reverse this situation with renewed vaccination efforts.”

Professor Bowdish agreed, saying, “It shows how many of our systems failed to protect public health. I hope it serves as a national reminder to fix those weaknesses before more outbreaks occur.”

Regional Outlook and Global Concern

The Americas was the first and only region in the world to achieve measles elimination in 2016. That recognition was suspended after outbreaks in Venezuela and Brazil but reinstated in 2024 following mass vaccination drives.

Now, renewed outbreaks in Canada, the United States, and Mexico have reversed that progress. The US Centers for Disease Control and Prevention (CDC) ranks Mexico among the world’s top ten countries with the largest current outbreaks.

As measles spreads again, experts warn that vaccine misinformation, complacency, and declining healthcare access threaten decades of public health gains. Therefore, cooperation between nations and sustained vaccination drives remain the only way to restore the Canada measles-free status and protect future generations across North America.