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.
В результате этой работы покрытие иммунизацией в Африке резко возросло с 10% в 1980 году до 72% в 2012 г.