This is true. It was said by Jonas Salk, who was attributed with the creation of the injectable vaccine in the 1950s that was greenlit for widespread use.

The injectable vaccine is a non-sterilizing vaccine (meaning you still get the disease, but your body can fight it off effectively - which is most vaccines). The injection vaccine was replaced by a sterilizing vaccine (where your bodily systems can kill the virus before you become contagious, and in many cases, before symptoms). The sterilizing vaccine, used to this day, is basically a magic potion that you drink. It kills the polio virus in your gut, which is the ingress method for polio.

From what I've seen, Salk didn't live to see the success of his vaccine; but he's a hero in my mind.

My late father was a polio survivor. He was permanently disabled as a result of the disease. He lost something like 70% of the use of his right (?) leg (could have been his left). He was still ambulatory, and could walk, but often needed to use his stronger leg when climbing stairs because his disabled leg was too weak to lift him up the stairs. He walked with a limp... And he was lucky. Post-polio survivors frequently had much more severe disabilities. I saw him struggle with the effects of it my entire life, and given he only had a relatively mild disability, I consider anyone who developed a poliovirus vaccine to be a hero of humanity, and anyone who refuses that vaccine to be an ignorant fool.

Salk's comments are just icing on that hero status for me.

Don't be a fool, get vaccinated.