Luc, I wasn't able to respond to your post for a couple of days because I've been mentally occupied with other things and I wanted to give it my full attention.
The issue with Wakefield is that he was discredited and his paper on MMR and autism (among other things) officially withdrawn from the Lancet. More here http://antidepressantwithdrawal.info...ight=wakefield
It is my understanding that he was involved in the development of a single vaccine for Measles and was urging parents to use that single vaccine rather than the MMR combination.
I know children with autism often have what is termed as a 'leaky gut' but it is also now known that so do many others.
As for the discussion about Thimerasol, the preservative that was used in many vaccines, I remember the controversy about that one. It contained mercury and there is a very high correlation between the symptoms of mercury poisoning and the the symptoms of autism. They removed Thimerasol from vaccines in the US (not sure whether it was even used in other countries, or whether it was removed if it was) but found that the incidence of autism continued to rise.
That is not to say that various chemicals aren't involved in the development of autism. It is highly possible that they are. It's just that, to the best of my knowledge, no direct causal links have been found.
For the record, the best paper I have ever read on the topic is this http://www.dramyyasko.com/wp-content...e-Behavior.pdf - If you have the time (it is 26 pages long) and are interested, you will like it because it comes from a Holistic Healer :)