Global polio eradication hopes hang in the balance after Nigeria setback
By By, Kate, Kelland, and and Stephanie LONDON/GENEVA (Reuters) - After two years in which the disease appeared beaten in Africa, polio eradication hopes hang in the balance with two cases of paralysis in Nigeria suggesting the virus has fought back, UN experts said on Friday. Many more cases of polio paralysis could come to light as investigators go into areas of northeastern Nigeria where the country's first cases in the two years were confirmed on Thursday. "There could very well be more cases," Michel Zaffran, head of polio at the World Health Organization, told reporters in a series of briefings.