from the world's big
Nigeria, which accounted for more than half of all polio cases in 2012, reported zero new cases of the infectious disease in 2017.
But if the campaign isn’t successful, this scourge could return with a vengeance.
Polio (poliomyelitis) has plagued humankind throughout history. Ancient Egyptian records speak of its ravages as far back as 1403 BCE. Outbreaks struck many societies, leaving victims disabled or worse. One particularly bad epidemic in the US in 1916 took 6,000 lives. As the last century progressed, outbreaks burst onto the scene periodically.