[liminvorous]

There have been some studies recently screening older people who grew up with more restrictive diagnostic criteria for autism that suggest that increasing rates of autism diagnosis are likely purely the result of changing diagnostic criteria and increased awareness rather than increased prevalence of austism.

[explorer83]

polio affected 8-37 out of 100000 people between 1940 and 1950 and everyone remembers it. CDC has identird 11 communities with 1 out of 36 8 year old children have been diagnosed with autism in 2020. Estimates place roughly 1/3 of those have less than 70 IQ. So let's say 1 out of 108 children.