did you read the link i provided? in case the implication wasn’t clear i’ll say it explicitly. Viruses which are virtually nonexistent (not circulating in the population) can be induced in a population by vaccination itself (in rare cases when using an attenuated virus).

Yeah, and the vaccines protect everyone else.
But the problem is that it seems that you consider a virus nonexistend when it do not infect humans, but it is not this way: viruses exist anyway, they do not go extinct.

It is not a coincidence that measles epidemics rise when and where the vaccination rates drops.

It will not be you (or who is making this decision) who will suffer the consequences so yeah, think vaccines are useless just because you don't see polio sufferers in the vaccinated population. Then open an history book and look for polio epidemics.