Where is best place to get required immunization for nursing degree

[jsd]

Yes, your primary care doctor. In my experience LabCorp is more for drawing bloodwork and running diagnostic tests, I've never gotten shots through them.

An N95 is a facemask (such as you would wear for COVID-19 safety measures). A fit test would just be checking that you're wearing it properly and that it is the right size for your face. I don't know how you would show proof of this if you're being asked for that. Maybe a doctor's note? Essentially all places within the US have ended masking safety requirements, so I'm surprised you'd be asked for that. Though given you'd be working inside a hospital with patients who could be high risk, that makes sense.