"Last summer, Dr. William Thompson, senior scientist at the Centers for Disease Control and Prevention and someone working on the national immunization program came forward after 13 years and said, 'We have known for 13 years, MMR vaccine causes autism and we have concealed that fact.'  "He not only said it, he gave us all of the documents--all of the original emails, transcripts, data outputs, databases, draft papers, original analysis plans, exchanges with his colleagues where he had tried repeatedly to bring this to their attention. Right to the very top of the CDC.  Right to Julie Gerberding, who was director of the CDC before she left to join Merck as their director of immunizations.  "They all knew: Walter Orenstein, head of the National Immunization Program--they all knew.  He had told them all. They concealed it systematically, and eventually, he could no longer live with himself.  He came forward and has become a whistleblower........ "And that is what they concealed, and in doing so they put millions and millions of American children in harm's way, knowingly and willfully."  Dr. Andrew Wakefield

Here is Julie Gerberding at the time of the Poling decision when she was still director of the CDC (before she took the revolving door to Merck's vaccine division) on CNN:  “Now, we all know that vaccines can occasionally cause fevers in kids. So if a child was immunized, got a fever, had other complications from the vaccines. And if you’re predisposed with the mitochondrial disorder, it can certainly set off some damage. Some of the symptoms can be symptoms that have characteristics of autism."   http://transcripts.cnn.com/TRANSCRIPTS/0803/29/hcsg.01.html