Canada is poised to lose its measles elimination status

Canada has tallied more than 5,000 measles cases this year, more than twice as many as in the past 25 years combined. Geoff Robins/AFP/Getty Images

Monday marks a full year of continuous measles transmission in Canada, a milestone that’s poised to set the country back decades on a global health commitment. Ongoing transmission in the United States puts it among a group of countries that also face scrutiny from international leaders and are at risk of a similar fate.

All of the World Health Organization’s regions have committed to eliminate measles by 2030, defined by the absence of local virus transmission for any period longer than 12 months. Canada achieved this goal in 1998, but falling vaccination rates set the stage for cases to grow into a massive — and ongoing — outbreak, puttin