Variations in two more genes have been associated with autism. These have to do with formation or functioning of synapses. My guess is they will eventually find 5 or 10 or 20 genes in which variations in different combinations cause the various symptoms of Asperger's through autism.
And anybody who still thinks vaccines cause autism is dumb. I was about to say misinformed, but this one is so settled that anyone who still thinks it is dumb, no matter how how many people have seen then naked and no matter much money they are paid to be in movies.