[JumpCrisscross]

> Amish in a very good study found that no Amish born children had autism. A rate of 0

Source? Are the Amish regularly screened for autism?

Also, the Amish are (a) far from the only unvaccinated population and (b) different from other Americans in other major ways. (The one that comes to mind is air pollution [1].)

[1] https://hsph.harvard.edu/news/air-pollution-linked-with-incr...

[thomasingalls]

The factor that comes to mind for me is genetic isolation, probably a much stronger factor. For instance, the Amish also have a famously higher incidence of Ellis-van Creveld syndrome than the general population.