http://articles.mercola.com/sites/articles/archive/2008/01/02/thimerosal-part-two.aspxThe Food and Drug Administration of the US approved a new preservative-free hepatitis B vaccine developed by Merck & Co. on August 27. Supplies of this vaccine should be available starting September 13th, but will be in short supply until the transitionenCommunityServer 2008.5 SP1 (Build: 31106.3070)