My brothers friend had polio. It was heartbreaking to watch her struggle in the braces on her legs.
We had worked sooooo hard selling salt at 10 cents a box for the March of Dimes and it finally paid off.
A few years back, one of my clients was using a walker. We were about the same age. He said "I missed the vaccine by 6 months".
We just keep trying but something new will come...and we know just a little more and solutions will come faster.
Now, just for fun, do a web search on Simian Virus 40 (SV-40).