The Coalition for Mercury-free Drugs (CoMeD) exposes communications between Centers for Disease Control (CDC) personnel and vaccine researchers revealing U.S. officials apparently colluded in covering-up the decline in Denmark’s autism rates following the removal of mercury from vaccines. Documents obtained via the Freedom of Information Act (FOIA) show that CDC officials were aware of Danish data indicating a connection between removing Thimerosal (49.55% mercury) and a decline in autism rates. Despite this knowledge, these officials allowed a 2003 article to be published in Pediatrics that excluded this information, misrepresented the decline as an increase, and led to the mistaken conclusion that Thimerosal in vaccines does not cause autism. In Denmark, Thimerosal, a controversial mercury compound used as a preservative in certain vaccines, was removed from all Danish vaccines in 1992. The well-publicized Danish study published in Pediatrics 2003 claimed that autism rates actually increased after Thimerosal was phased out. This study subsequently became a cornerstone for the notion that mercury does not cause autism. However, one of the FOIA documents obtained from CDC clearly indicates that this study omitted large amounts of data showing autism rates actually dropping after mercury was removed from Danish vaccines.