My father in law, mid Boomer American of rural upbringing, got polio as a child and sustained some muscle weakness which led to him swimming for physical therap

My father in law, mid Boomer American of rural upbringing, got polio as a child and sustained some muscle weakness which led to him swimming for physical therapy and later becoming a competitive swimmer. It was an interesting conversation to have when COVID was a concern and vaccines were just starting to get deployed