Ontario seeing massive spike in measles cases, officials warn of outbreak [Video]

Measles cases have rapidly increased in Canada since the start of the year, with the majority reported in Ontario.

According to Public Health Ontario, 252 confirmed cases and 66 probable cases of measles have been logged in the province this year as of Wednesday.

The organization said all but five cases were associated with an ongoing multi-jurisdictional outbreak, five cases had a history of travel and were acquired outside of Canada and one was epidemiologically linked to a visitor to Ontario.

Of these, three cases required hospitalization, all among unimmunized children.

“In the past, cases in Ontario have been primarily associated with travel, meaning they acquired measles outside of Canada. However, there is currently a measles outbreak in Ontario, primarily southwestern Ontario, and the majority of measles cases in 2025 have been acquired in Ontario,” Public Health Ontario warned in a statement.

Measles cases have spiked dramatically, increasing by 195 since …