Here was some rather strange things I remember. About 20 kids were Autistic. BTW this was a regional school serving six counties and two larger metro areas. It wasn't that common. One kid IIRC had no arms or legs due to a shot her mother took before she was born. ADD ADHD wasn't too common and I was diagnosed with it or rather misdiagnosed with it. This was in the early 1970's.
What has changed vaccine wise in the past two decades or so? One thing is the combination shots and another was the big rush to inject as many shots as possible at the earliest age possible. If there is a problem linking vaccines to say Autism I think that the spacing between shots and combined vaccines would be the logical place to look.
With pressures to get kids in school at age three of four and more and more parents using daycare rather than kids staying home the vaccines got stepped up. The vaccine in themselves may be safe and lower risk when the body is not bombarded with them.
That is the part of the vaccine program I think they need to seriously rethink. Also as a kid we had no Pre-K nor Kindergarten for that matter so parents weren't in a huge rush nor forced to be in such.
I think it helps to get the immune system strong as young as possible, and too many people these days want to live in as sterile an environment as they can make.
I mean I grew up in farm country, playing in the mud, playing in the streams, gardening and digging and playing with pets and wild animals.
Pretty much if there’s something out there, I was probably exposed!