Ontario measles cases rise amid growing concern about spread among unvaccinated individuals

Measles cases continue to rise in the country’s most populous province, with Public Health Ontario reporting Thursday there has been more than 100 new cases of the highly contagious disease in the last week.New figures released by Public Health Ontario show since the beginning of 2025, a total of 440 measles cases (357 confirmed and 83 probable) have been reported in Ontario, as of this Wednesday.