I think if nurse doesn't want to get vaccinated it's their choice and probably something they have thought about considerably. There could be any number of reasons why they choose not to get it, maybe they saw someone with a bad reaction and they feel they are young and healthy enough to handle covid, maybe they have had covid and are going with natural immunity, maybe they want to have kids in the near future and want to hold off on the vaccine for now.... They have been working on the frontline throughout this with no vaccine and have survived. Nothing to do with science, we can all see vaccines help to reduce your chance of severe illness and death if you are likely to suffer this from covid in the first place i.e. have underlying conditions or are older, if a nurse chooses not to get this vaccine, we should respect their choice