I personally only learned this recently, apparently they started finding out about autism as an actual thing (before it had that name) back then, and immediately noticed the fact that only kids given vaccines had it, and that the onset was just after vaccines being administered. Back then the pharma kike industrial complex wasn't intertwined so closely with their media kike inbred brothers so they weren't able to erase the doctor's findings from existence (effectively) like they can now. Prior to learning about this I thought vaccines only became poison after the 1986 Children's Vaccines Liability Act (or whatever it's called, the one that absolves all pharma corps of any liability for vaccine injuries in child vaccines, and the year in which they started adding dozens of shots per year to the childhood schedule), but apparently nope.