And you are probably right

From Mercola.com http://www.mercola.com/2001/feb/24/autism_mercury.htm

Autistic Gut

Headlining the September 2000 San Diego Conference was Andrew Wakefield, the British surgeon whose shocking new discoveries show that mercury toxicity alone is not the only factor linking vaccines with the autism epidemic. Dr. Wakefield's research centers around the MMR vaccine - measles/mumps/rubella - which does not contain thimerosal.

Expanding on his presentation at the April 2000 Burton hearings, Dr. Wakefield explained how at least three-quarters of autistics have pathologically blocked bowels, due to the huge swelling of the tissue lining the intestine.

In virtually every autistic patient they examined, this nodular hyperplasia is both an immune response and an autoimmune response that Wakefield and O'Leary have clearly linked to the presence of measles virus from the MMR shot. No other virus was found in those cells.

It is a new bowel pathology.

Wakefield showed graphs of the U.S. and U.K. 10 years apart that were identical in tracing the skyrocketing incidence of autism just after the MMR vaccine was introduced.

He also showed how the incidence of measles had dropped over 85 percent on its own before the MMR was introduced.

One incredible study cited by Wakefield showed how 76 percent of children whose mothers were exposed to atypical measles became autistic after the MMR shot! He called this a "background susceptibility" or predisposition to autism.

Wakefield reminds us that in neither country have there ever been comparative studies on giving multiple vaccines (polyvalent) on the same day.

This custom of ours, with both the DPT and the MMR, is not scientific by any stretch, and is primarily for the convenience of those administering the shots, and those being paid per vaccine. As a result, there is a good chance of geometric ill effects.

Then Wakefield cited the original MMR study (Buynak, Journal of the American Medical Association 1969, vol. 207).

Not only was the safety of multiple vaccines never mentioned, there was no follow-up to the study to see if their conclusions were correct.

In the usual manner of testing vaccines on the live population, MMR was simply tacked onto the mandatory schedule, and we've never looked back.

Despite studies in 1981 on Air Force personnel showing major synergistic adverse effects in the gut from the combination of measles and rubella vaccines, the mandatory schedule went unchanged.