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PBS News Hour
Once nearly eradicated, polio makes fresh comeback
Signaling a new public health emergency, the World Health Organization warns that if polio is not completely eradicated it could become endemic again. Worldwide, 74 cases of the crippling disease have been confirmed this year, with Syria, Cameroon and Pakistan leading with the most occurrences. Jeffrey Brown learns more from Dr. Jon Andrus from the Pan American Health Organization.
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