If I remember the original article correctly (which is not a sure thing, I assure you), he found lymphoid hyperplasia in the intestines of autistic children and not in the control group. Again, if I remember correctly, he subsequently found measles immunoreactive material in the lymphoid hyperplasia. He then made the rather large and incautious leap to conclude
that autism was caused by the measles vaccine, despite:
1. Not having shown that the immunoreactive material was, indeed, the measles virus and not merely a cross-reacting protein.
2. Not having shown that the measles proteins (see #1) were from the vaccine strain (a difficult thing to do under the best circumstances).
3. Not having shown a causal relationship in any other way than finding measles proteins in the gut of autistic children (after all, it could be that whatever causes autism also makes children prone to chronic measles infection OR generates a protein that cross-reacts with measles antibodies).
Now, he has published other papers in which he asserts that he has settled (1) and (2), but the third issue still has not been addressed, to my
knowledge.
What I would like to see is more attention paid to Dr. Wakefield's
conclusions and less to the details of his financial dealings...