The science confirming the safety of BPA in food packaging is very strong, yet some advocates find it somewhat unsettled.

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The last votes that have to be counted yet are coming in from districts that are very strong supporters of the PAN, Felipe Calderon's party.

NPR: Calderon Holds Lead in Mexican Vote Recount

This is especially true for very young infants, who are too young to be vaccinated and whose immune systems are not yet strong enough to defeat the bacteria on their own.

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