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Centers for Disease Control and Prevention

CDC immunization panel recommends against flu vaccines containing the preservative thimerosal

Thimerosal is a preservative that’s been used primarily in multi-dose vaccine vials to prevent contamination with germs. It contains a form of mercury different from the toxic form found in fish, and studies have shown consistently that it does not pose health risks, though some anti-vaccine advocates continue to spread misinformation that there is a link between the preservative and autism.

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