What is different about vaccines today than when we were growing up?
I had a retired medical professional tell me that much has changed with vaccines since we were kids (like everything else) they have became more advanced and elaborate, from what I understood they have concentrated many into one, and from what she told me they are using aluminium as a binding agent.
I'm not as informed as she is, so I can't go into detail like she did, but if you are implying that there is no difference in the vaccines then and now then you would be mistaken.
The number and the types of shots.