Canada is on track to lose its measles elimination status as an outbreak that began a year ago continues to spread. The United States could follow in the coming months. The Canadian outbreak began in October 2024 in New Brunswick, a province on the country’s eastern seaboard. As of Tuesday, more than 5,000 cases had been reported. Two babies have died. Canada eliminated measles in 1998. The U.S. followed two years later, in 2000. There are multiple criteria for losing an official measles