Those in contact and dealing with the "vulnerable" would be made to have a vaccine. No doubt about that. And that's IF the vaccine works 100% of the time, which is impossible. So how would I pose a threat to them? False dichotomy, I'm afraid.
And don't twist the argument with ad hominem attacks. Those responsible for the vulnerable in society are perfectly capable of protecting them - without me or my "ilk" posing a risk or endangering them.