It's amazing that people want to rush to sue someone when nobody knows what causes autism. How can a drug company be held responsible for autism when the cause of autism is not known?
As I pointed out before, autism was originally associated with the MMR vaccine on the strength of a study by Andrew Wakefield in Britain that covered all of 12 children. Subsequent studies showed NO association.
But now we see that autism has become the new cause celeb, and every vaccine is blamed. It's pretty sad, especially since, as you said, we don't know what causes autism.