TORONTO — Canada is poised to lose its international status as a measles-free country now that an outbreak that began in New Brunswick and spread to other provinces has hit the one-year mark.

The country eliminated measles in 1998 and maintained that status for more than 25 years, meaning there was no ongoing community transmission and new cases were travel-related.

But since Oct. 27, 2024, the virus has spread to more than 5,000 people in Canada, including two infants in Ontario and Alberta who were infected with measles in the womb and died after they were born.