http://articles.mercola.com/sites/articles/archive/2005/01/19/mercury-vaccines-part-six.aspxThimerosal, a preservative developed by Eli Lily, was once widely used in vaccines. That was until it was identified as the source of the largest exposure to mercury in the United States in children under 18 months of age and mandated to be removed fromenCommunityServer 2008.5 SP1 (Build: 31106.3070)