There are different Polio Vaccines. One of the early ones actually gave some people polio. Rush to market and competition for credit. Lesson learned.

Now how about Smallpox? Vaccination was so successful that Smallpox is now history.

https://en.wikipedia.org/wiki/Smallpox

"Smallpox was an infectious disease"

Doctors wanted me to have Hepatitis vaccination. I said fine, but since I am immune compromised would it have any effect? It must cost something to administer. They actually check antibody levels after. I was non responsive. Same story a year later after a second try. 

One day I will probably end up on the wrong side of the odds at the dialysis clinic. If you work or get treated there and don't have a successful vaccination the question is when you will get Hepatitis, not if. Why would anyone say no?

I am not an anti-vaxxer, just realistic about my health status.