On top of that, I've seen a number of studies that show a strong correlation between parental age at birth and ASD occurrence. The older the parents, the more likely the child is to develop autism.
And the Amish start earlier, which means that even if they have the same amount of kids as another family they will also be stopping earlier.
We could probably sit here all day listing factors that probably contribute just as much as vaccines speculatively. Which is the point of "science and control groups." To remove as many of those as possible to try and only measure the singular variable.
On top of that, I've seen a number of studies that show a strong correlation between parental age at birth and ASD occurrence. The older the parents, the more likely the child is to develop autism.
And the Amish start earlier, which means that even if they have the same amount of kids as another family they will also be stopping earlier.
We could probably sit here all day listing factors that probably contribute just as much as vaccines speculatively. Which is the point of "science and control groups." To remove as many of those as possible to try and only measure the singular variable.