The CDC released the most recent autism prevalence numbers which showed an increase from 1 in 36 kids to 1 in 31 kids. In this episode, Cari and Jim discuss factors contributing to the increase in autism prevalence in the United States including 1) improved understanding of the Autistic neurotype, 2) increased identification of autism in previously under-identified groups, and 3) assortative mating. 

Here are the 2 links mentioned in the episode:

1013.full.pdf

The Evidence on Vaccines and Autism | Johns Hopkins | Bloomberg School of Public Health