Why didn't all the amish die from covid? None of them take vaccines. They should all be dead. Also none of them get autism. I wonder why

Why does no one care that the Amish never get autistic kids? Especially now that in the usa, you have a 1 in 30 chance for your kid to be autistic. 50 years ago, it used to be a 1 in 50,000 chance for your kid to be autistic.

It's almost like our country is ignoring autism, which is the real pandemic. I wonder why the amish never get autism. Sure is a mystery to me.