https://deeprootsathome.com/why-marin-county-had-a-record-breaking-decline-in-autism-rates/

The first US county to ever experience a decrease in childhood autism rates has been pinpointed, says Ph.D. and economic researcher Toby Rogers from the Brownstone Institute. He explains that starting in 2000, parents in Marin County, California began to do something differently.

Rather than blindly following the childhood vaccine schedule of the CDC, the parents got together and decided to defy the CDC due to their concerns about safety and the number of shots on the schedule.