Officials have closed Manitoba’s measles outbreak after 1,038 cases, but low MMR coverage means the conditions that enabled the preventable crisis remain.
Manitoba’s declaration that its measles outbreak is over marks a public health milestone, but it is not cause for celebration. According to Manitoba Public Health, the province’s last laboratory-confirmed case was identified in August, and the absence of any new cases since then allowed officials to close the outbreak. Yet the more important point is that this should never have happened in the first place.
The scale of the spread was striking. Manitoba recorded 1,038 measles cases during the outbreak, including 931 confirmed and 107 probable cases, after the virus began circulating in the province in February 2025. At one point this year, Manitoba had more cases than any other province in Canada, following an outbreak that first emerged in New Brunswick in late 2024 and then moved across the country. Before this episode, Manitoba had seen only one case since 2019, and that was linked to travel outside the province.
Public health officials have long warned that the rise of measles is tied to declining confidence in vaccination, especially the measles, mumps and rubella shot. That doubt gathered force after a flawed 1998 study published by The Lancet falsely suggested a connection between the vaccine and autism. Although the paper was quickly discredited, its claims spread widely online and helped seed a persistent anti-vaccine movement that gained momentum as social media made misinformation easier to circulate.
The consequences are visible in Manitoba’s vaccination figures. Health data show the province’s overall MMR coverage among seven-year-olds is just above 65.4 per cent, far below the roughly 95 per cent needed to maintain herd immunity. In the Southern Health region, where many of the cases were concentrated, the rate is 53.3 per cent. Manitoba Public Health said 87 per cent of the outbreak cases involved people who were unvaccinated or whose vaccination status was unknown, underscoring how preventable this outbreak was. The virus may no longer be spreading in the province, but the conditions that allowed it to return remain dangerously familiar.
Disclaimer: This content is for informational purposes only and is not intended to be a substitute for professional medical judgment, advice, diagnosis, or treatment.
