while there is overwhelming scientific proof that vaccinations do not cause autism, and Europeans as a society do believe in vaccinations and use them, I don't know of any research exploring a link between autism and the hundreds of millions of pounds of pesticide poison America dump into our diet and environment each year. Europe has both lower reported autism rates and less pesticide use. If you want to wonder about causes of autism, this is a much more likely and difficult cause. Although the difference in autism rates could simply be due to different diagnostic approaches, it is worth studying. and wondering...