I seem to recall one booster had a big needle...Maybe DPT?
MMR did not exist. Polio was a sugar cube. From what I recall, only smallpox, polio, and DPT existed during my childhood.
Travelling in Mexico as a teen required some additional shots.
It is interesting that this is a drug for treatment—not prevention. You would think this vax-obsessed administration would be contracting for more of the traditional-type smallpox vaccines...