India marks three years without polio, but challenges remain

Aired: 1/17/2014 | 0:06:27 | Clip
Health officials in India have hit a milestone in their efforts to eradicate polio: It has been three years since the country's last reported case of the crippling disease. Special correspondent Fred de Sam Lazaro reports on India's challenge to remain vigilant in its campaign to immunize children one mouthful at a time.

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