I suspect the healthcare workers who get it and died die of a combination of the disease, overwork, and waiting far too long to rest after they get it, or for that matter to be tested.
People who already have an immunity at least to COVID-19 would not need masks, I don’t think. Maybe I am missing something, and certainly there will be other diseases present, but I personally have never observed ordinary ER personnel wearing masks until this thing.
And actually, as far as that goes, various State governments could ask for volunteer “quarantine lifters”, who agree to be infected in order to go back to work once they clear it out. The advantage of this would be rapid treatment. Everyone would know right away, and rest, and do everything correctly.
When I read about people being arrested–I think that’s what I saw, but they may have been just broken up–for having coronavirus parties, I wonder how we can remain free in this country. Our leaders have no imagination, and neither, seemingly, do the police they depend on to execute their idiotic orders.