Canada was certified by the World Health Organization (W.H.O.) as a nation that had “eliminated” measles in 1998.
Elimination status is defined by having zero confirmed cases of local transmission for 12 consecutive months. However, a modest number of cases imported by travelers from other countries are allowed within this definition.
https://www.allsides.com/news/2025-11-06-0800/healthcare-canada-may-lose-measles-elimination-status-cases-rise