If you were in grade school, as I was, during the polio epidemic, it’s very likely that your parents would have given you the polio vaccine. For starters, it was eaten as a food as a purple dye on a sugar cube, not an injection.
At the time, we children couldn’t go to any summer gathering such as fairs, carnivals, or even swimming holes, for fear of polio. It was a terrible disease as it paralyzed body muscles. Those who had paralyzed breathing were relegated to a lifetime in an “iron lung”, a coffin like device with only your head sticking out, that breathed for you. Others had paralyzed arms or legs, or half faces, along with atrophied muscles making them look like moving skeletons.
The polio vaccine made childhood fun again. It also led to ‘herd immunity’ that removed polio from the country, though it may be returning now with Biden’s hoards of unvaccinated illegal immigrants.