Africa declared free of wild polio in momentous milestone

The World Health Organization (WHO) on Tuesday declared that Africa was free of the virus that causes polio, a landmark in a decades-long campaign to eradicate the notorious disease around the world.

"Today is a historic day for Africa," said Professor Rose Gana Fomban Leke, whose commission certified that no polio cases had occurred on the continent for the past four years, the threshold for eradication.

Poliovirus now joins smallpox on the list of viruses that have been wiped out in Africa, the WHO said.