60 h. ago Check your measles vaccination, B.C. urges, as Ontario and Texas outbreaks grow

Health officials said they were concerned about the potential for measles to spread in B.C. as families return from overseas vacations in virus hotspots during spring break.

Science

3 d. ago ‘Discouraging’: Ontario measles outbreak rises to 572 cases, putting parents and educators on alert

More measles cases have been reported in Ontario over the last week than the total number of cases recorded in the decade between 2013 and 2023

Other

3 d. ago Ontario measles outbreak: Surge of 100 new cases in past week

That brings the total of reported cases in the province to 572 since the start of the year.

Other

3 d. ago Ontario measles case count rises by a 100 in just a week, total reaches 572

Public Health Ontario is now reporting 572 confirmed and suspected cases since the outbreak began in October. That’s an increase of 102 cases since March 20.

Other

3 d. ago Ontario measles case count hits 572, up by more than 100 in week

Measles cases keep climbing in Ontario, as the province counts more than 100 new cases in the past week. Public Health Ontario is now reporting 572 confirmed and suspected cases since the outbreak began in October. More coming.

Other

4 d. ago Measles 'inevitable' in Ottawa, expert warns as Ontario outbreak spreads

Ottawa has begun monitoring wastewater for measles as Ontario's outbreak spreads.

Other

6 d. ago Mennonite gathering in New Brunswick source of Ontario measles outbreak

A measles outbreak that has infected scores of unvaccinated children in Southwestern Ontario reportedly had its start at a Mennonite religious gathering in New Brunswick last year. In a March 7 letter to Ontario’s health units, the province’s chief medical officer of  health, Dr. Kieran Moore, said there was “an exposure at a large gathering […]

Other

6 d. ago Ontario measles outbreak linked to New Brunswick Mennonite gathering

Dr. Kieran Moore wrote measles is 'disproportionately affecting some Mennonite, Amish, and other Anabaptist communities' because of under-immunization and exposures.

Other

9 d. ago Calls grow for Ontario to do more to tackle growing measles outbreak

On Thursday, Public Health Ontario reported a total of 470 measles cases, up from 120 cases the week before. Thirty-four people were in hospital and two in intensive care.

Other

1 week ago Ottawa Public Health preparing for measles cases as surge continues in Ontario

Since an outbreak began last October, there have been 470 cases reported in Ontario by 11 different public health units.

Science

1 week ago Ontario sees another sharp increase in measles cases over a week

Ontario has seen another sharp increase in measles cases over the last week as the highly infectious disease spreads among mostly unvaccinated people. 

Other

2 w. ago Amid measles outbreak in Ontario, RFK Jr.’s advice has Canadian experts alarmed

America's new top health official said the measles vaccine 'causes deaths every year' and 'all the illnesses measles itself causes'

Other

2 w. ago Measles case numbers soaring in Ontario as health officials urge immunization

Among those who have been infected recently are a newborn and seven pregnant women, Public Health Ontario says.

Science

2 w. ago Ontario seeing massive spike in measles cases, officials warn of outbreak

According to Public Health Ontario, as of Wednesday, 277 confirmed cases and 69 probable cases of measles were reported in Ontario in 2025.

Other

3 w. ago How bad is the measles threat in Ontario? Health officials aren't sure

Amid the largest measles outbreak in 30 years, health officials in Ontario are 'flying a bit blind', a leading immunization expert is warning.

Science