Welp, things aren't too bad. The infected Covid-positive resident, and their unaffected roommate, both got moved to our Covid isolation unit for 2 weeks quarantine. The other wing was completely reopened again shortly after I arrived for work, but, the infected wing has to stay closed until the 23rd.
As I feared, the resident was vaccinated against Covid but still caught it. I know the vaccine isn't 100% effective, but, that's still worrisome. Said resident very seldom leaves the facility or even their room, so, it's almost certain that they were infected by staff, most likely the CNA who recently tested positive (I don't know if that employee was vaccinated or not).
Turns out I have to wear a N95 mask too, but, only on the infected wing. However, I have to frequently travel back-and-forth between both wings, so, I'm just leaving it on, I'm not switching masks all day. Not as comfortable as a regular mask, but, not unbearable either.
On the upside, we finally got our travelling CNAs, about 8-10 of them, so, short-staffing and mandated 12-16 hour shifts should mostly end now. We should be able to start accepting new residents again too (we're a 100 bed facility, but only have 71 residents at the moment, as we've been unable to accept new ones, to replace deceased ones, due to the staffing shortage).