India declared polio-free, but global risks persist

By Nita Bhalla NEW DELHI, March 27 (Thomson Reuters Foundation) - The World Health Organisation declared India free of the crippling polio virus on Thursday, making the country's almost two-decade-long, multi-billion-dollar effort one of the biggest public health achievements in recent times. India's last case of the wild polio virus was detected in January 2011 in a two-year-old girl in the state of West Bengal.

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