Talk of treaty ban on mercury concerns scientists

(AP) -- Scientists are warning officials negotiating a global treaty on mercury that banning the deadly chemical completely would be dangerous for public health because of the chemical's use in vaccines.

The ban option is one of several proposals on the table for a meeting later this month in Nairobi, but a final treaty isn't expected until 2013.

A large number of vaccines - including for diseases such as tetanus, and meningitis - contain mercury compounds, which prevent contamination.

David Wood, a vaccines expert, says not being able to use mercury "is not a viable option."

Most of the concerns about mercury center on emissions from burning coal, gold mining, and people eating fish tainted with the chemical.

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