Ebarn
you are absolutely right in the change of definition of the disorder. I read once that if we applied the 1970 standard to today's rate it would not be 1 out of 150 but more like 1 out of 400 .. still incredibly high from 1 out of 10,000 as in 1970 .. something sure has changed with our children, and that has to be extended across nations not just the US. We are left with only questions. Hence it is reasonable for people to ask and question the safety of a new vaccine introduced since then since it is a common thread across nations. In the past when polio was the scourge, it affected 1 out of 2500 kids. This nation when to war to end polio .. why not such an effort to find and eliminate Autism? Go figure