No, I was given the polio vaccine as a child to keep from getting polio. My wife didn’t get it and she got polio. Fortunately she somehow recovered but has been pretty much paying for it her whole life. Others getting that shot didn’t do anything for her.
Umm - both?
The only known vector of poliovirus transmission is person-to-person. There is no known reservoir in animals. So if blanket vaccine dosing had been started a year or two earlier, the likelihood your wife would have gotten it would have decreased. Until we wipe it out, it’ll never be zero, but the chance of an unvaccinated child in the US getting it are very low.
Of course this opens up another discussion. The only part of the world there is still a significant presence of poliovirus in Afghanistan and Pakistan. So, if you let untold numbers of Pakistanis and Afghanis in, then your previously established herd immunity is destroyed.