We can’t stop vaccinating against polio until it has been eradicated.
The benefits of getting vaccinated against polio clearly outweigh the risks.
Because you likely don’t remember much about polio and may have never known anyone who had polio, it is an easy target for propaganda by anti-vaccine folks.
DDT is a pesticide that was widely used after World War II and was sometimes sprayed in a vain attempt to keep polio outbreaks from getting out of control. That is the only connection to polio though.