Hey, if correlation means a probable causation, then the only time that incidnce rate of polio drops with out a resurgence, correlating with the introduction of vaccines means vaccines were the cause. Right Robert?
Or does it only mean a known cause when it suits you?
Oh and those links you keep plugging, I can't find anything in there to show that Amish are or are not vaccinated.
The correlation does not mean vaccines have anything to do with the figure anyway. In the ven diagram of Amish in one circle and Non-Amish who vaccinate, there are a lot of other factors at play. That "non Amish who vaccinate" is a much wider net to cast, so there will be more varyation of social and genetic factors at play. Non-Amish who do not vaccinate are more likely to have:
1) Bred with somebody outside of the small Amish community, meaning the genetic cause of Autism is more likely to be in their DNA
2) Had extensive contact with a broader spectrum of people outside of the small group. So the viral causes are more likely to have been encountered.
3) To have used or encountered a lot of products the Amish do not allow in their lifestyle. There is no less evidence that kool aid, mobile phones, modern nappies, cars, computers, televisions, processed foods or internet trolls are a factor in autism incident rates than vaccines.
4) Diagnosis levels of the autism spectrum will differ in a broader community than a losed one. As everybody can tell from the studies already posted here it is diagnosis, not incident rate, of autism that is increasing.