Well, nurses are medical professionals, which indicates they’re at least somewhat intelligent and have some kind of accredited medical licensure.
So, they’ve probably been vaccinated for months. Because they’re not dumb.
Perhaps you should found a hospital for the anti-vaxx crowd.
You can get all of the students that didn’t make the cut. They can resort to bleeding patients, leaches, snake oil, drinking bleach or whatever else it is you flat-earthers get down with.