Polio was the bane of our (or my) parent’s generation. And the polio vax was still being given in developing countries up until the 1990’s or early 2000’s when Rotary International declared it eradicated. Polio vax and the eradication of the disease had been a big philanthropic / public health focus of RI for many years.
I am aware. I was just noting there is a cost/benefit analysis in play. As Polio became more rare, the risk from taking the vaccine became more dominant, especially with that price if things went wrong.