Not about the Polio vaccine, but the story behind the first and possibly the most important vaccine to date, the Smallpox vaccine.
When the guy who did the first recorded vaccination, at around 1800, did it, times were sure different.
He was an Englishmanby the name of Dr Edward Jenner and he noticed that people who worked with cows and who had cowpox, never got sick from Smallpox. Now, Cowpox was a mild disease, but Smallpox was deadly and killed many millions at the time. So, he asked his gardener whether he could inoculate his young son with Cowpox. The gardener agreed and they i