Personally I would use this experience as a time to observe employee attitudes and behaviors.
And quite frankly after I make my judgments I would not rehire the marginally performing ones or those with attitude. Nows your chance.
When this is over there will be plenty of people looking for work so youll have your pick of replacements
Re:14 - Agreed, 100%.
This is really a study in character. Please use it to determine who your topline employees are - and do what you can to retain them.
I could understand if people were afraid to return because of COVID-19. But it sounds though, as more and more of these sorts of stories come out, that some people are just gaming the system.