Medicine
Global Polio Eradication Challenges in Conflict-Affected Regions
Quick fact
In 1988, polio was endemic in 125 countries; by 2021, only two countries—Afghanistan and Pakistan—never interrupted transmission, both wracked by conflict. Even when a country eliminates the virus, it can be re-imported from a conflict-ridden neighbor.
Why this is interesting
Polio is on the verge of extinction—but it clings to life in the world's most dangerous places. Why can't we finish the job?