Indeed, as the world debates the best way to recover the missing girls, another menace is resurfacing: the World Health Organization recently declared the spread of polio an international public-health emergency, with several African countries now posing an ongoing risk of exporting the disease.
Als resultaat van dit soort werk is de immunisatiedekking in Afrika dramatisch verbeterd, van 10% in 1980 tot 72% in 2012.