Ontario has watched its measles count nearly double in just two weeks, a reminder that a disease once thought tamed can return when protection thins. Since an outbreak took root last autumn and reached across provincial lines into New Brunswick and Manitoba, the province now has 119 laboratory-confirmed cases and 23 probable ones, already more than it recorded across the entire decade from 2013 to 2023. The cost falls most heavily on unvaccinated children and teenagers, and as health officials point to waning immunization and easy international travel, the question becoming clearer is whether
Ontario Measles Cases Nearly Double as Interprovincial Outbreak Spreads Among Unvaccinated Children
18 children have been hospitalized, one requiring intensive care, mostly unvaccinated children and teenagers.
One outbreak has passed a decade of measles cases
Mark
Why does the 101 figure matter so much here?
Mimi
It gives scale. Ontario recorded 101 infections over ten years, from 2013 to 2023. This year's count is 119 confirmed plus 23 probable, so one outbreak has passed a decade of cases.
Luke
Careful with the totals, though. The 119 are lab-confirmed and the 23 are only probable. And 177 is the outbreak count since October, which is a different measure from this year's total.
Mark
So those numbers don't add up neatly?
Luke
Right, they cover different periods and definitions. The report doesn't reconcile them.
Mimi
What is clear is who is affected: mostly unvaccinated children and teenagers. Eighteen have been hospitalized, one in intensive care.
Mark
And the child who caught it abroad?
Mimi
That case was unvaccinated and hospitalized. It shows the virus can be imported, which fits the agency's point about international travel.
Luke
The agency names three causes: global rise, lower vaccination rates and more travel. The report doesn't say how much each contributes, or what Ontario's vaccination rates actually are.
Mark
And the Texas death?
Mimi
It's context, a first U.S. measles death in a decade, of an unvaccinated child. It isn't part of the Ontario outbreak.
Luke
Agreed. It shows the risk, but nothing here predicts where Ontario's counts go next.
Il Polso
- Seventy-eight new measles cases in two weeks have nearly doubled Ontario's count, and the numbers are still climbing.
- Eighteen children have been hospitalized, one in intensive care, and the sick are overwhelmingly unvaccinated young people.
- A single unvaccinated child infected abroad shows how easily the virus crosses borders and finds someone unprotected.
- The outbreak has spread from Ontario into New Brunswick and Manitoba, while Quebec battles a separate 27-case outbreak that began in December.
- Officials are urging vaccination as the clearest defense, and the coming weeks will reveal whether child immunization rates rise or the spread keeps outpacing them.
Ontario has watched its measles count nearly double in just two weeks, a reminder that a disease once thought tamed can return when protection thins. Since an outbreak took root last autumn and reached across provincial lines into New Brunswick and Manitoba, the province now has 119 laboratory-confirmed cases and 23 probable ones, already more than it recorded across the entire decade from 2013 to 2023. The cost falls most heavily on unvaccinated children and teenagers, and as health officials point to waning immunization and easy international travel, the question becoming clearer is whether communities can rebuild the shield that once kept this virus at bay.
Ontario added 78 measles cases in the past two weeks, a jump that nearly doubles the province's count since an outbreak began last autumn. Reported on Thursday, February 27, 2025, the news arrives with a sobering total: 119 lab-confirmed cases and 23 probable ones, already surpassing the 101 infections recorded across the whole decade from 2013 to 2023.
Nearly all of the new cases trace back to an interprovincial outbreak that started in October and has now sickened 177 people in Ontario. The virus has also taken hold in New Brunswick and Manitoba, and Quebec has its own outbreak of 27 cases since December.
The heaviest burden falls on children. Eighteen have been hospitalized, one needing intensive care, and most of those affected are unvaccinated children and teenagers. One case reported Thursday was a child infected outside Canada, a reminder of how easily the disease arrives from abroad and finds someone with no defense.
Across the border, the United States recorded its first measles death in a decade on Wednesday, an unvaccinated child in Texas. The Public Health Agency of Canada links the spread to a global rise in measles, falling vaccination rates, and more international travel, and it maintains that vaccination remains the best protection. The next signals to watch are whether case counts keep climbing and whether children's vaccination rates begin to improve.
Ontario added 78 measles cases in the past two weeks, a jump that nearly doubles the province's count since an outbreak began in the autumn. The figures were reported Thursday, Feb. 27, 2025.
The province's total for this year now stands at 119 cases confirmed in a laboratory, plus 23 more classed as probable. That is already more than the 101 infections Ontario recorded in the entire decade from 2013 to 2023.
Almost all of the new cases trace back to an interprovincial outbreak that started in October. Across the whole outbreak, 177 people in Ontario have been sickened. The virus has also spread in New Brunswick and Manitoba. Separately, Quebec has reported its own outbreak of 27 cases, which began in December.
The cost falls mostly on the young. Eighteen children have been hospitalized because of the outbreak, and one of them needed intensive care. The disease has primarily infected children and teenagers who are unvaccinated.
One of the cases reported Thursday was an unvaccinated child who caught measles outside Canada and had to be hospitalized. It shows how the virus can arrive from abroad and land in someone with no protection against it.
The situation south of the border is also grim. On Wednesday, the United States recorded its first measles death in a decade, when an unvaccinated child died in Texas.
Measles is airborne and highly contagious, yet preventable. It usually starts with a fever, cough, runny nose and red, watery eyes. A red blotchy rash follows, beginning on the face and spreading to the body and limbs. The virus can lead to pneumonia, inflammation of the brain and death.
The Public Health Agency of Canada attributes the current spread to three things: a global rise in measles, reduced vaccination rates, and increased international travel. The agency says vaccination is the best protection. What to watch next is whether case counts keep climbing in Ontario and the other affected provinces, and whether vaccination among children improves.
Citazioni salienti
The current spread is due to a global rise in measles, reduced vaccination rates and increased international travel, and vaccination is the best protection.— Public Health Agency of Canada (paraphrased)
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