There was a study evaluating Amish children and much less had autism (1 in 271 compared to 1 in 36 for the US). It could be many things, true but vaccines have been demonstrated to cause autoimmune disorders (and autism is one) due to frying up the immune system in some recipients.
The age thing you propose can easily be controlled for by looking at children of young parents only who followed with the vaccine schedule. Also, the Amish have on average 6-8 children and the youngest are inevitably conceived at an older age.
There was a study evaluating Amish children and much less had autism (1 in 271 compared to 1 in 36 for the US). It could be many things, true but vaccines have been demonstrated to cause autoimmune disorders (and autism is one) due to frying up the immune system in some recipients.
The age thing you propose can easily be controlled for by looking at children of young parents only who followed with the vaccine schedule. Also, the Amish have on average 6-8 children and the youngest are inevitably conceived at an older age.
https://imfar.confex.com/imfar/2010/webprogram/Paper7336.html