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NAIROBI, Kenya — Kenya announced its first polio infection in 20 years on Wednesday, after a 4-year-old girl was diagnosed with the disease along the country’s remote border with Sudan.
“In a country free of polio, when you make a diagnosis of one case of polio, the definition is an outbreak,” said Dr. David Okello, country representative of the World Health Organization.
For every child paralyzed by polio, there are about 200 other asymptomatic cases who can spread the disease to others.
Okello said the disease may have spread from south Sudan, where a polio outbreak occurred in early January.
