I go into isolation mode fast when something like this hits, but I don't know if you have any spare space for this? Since you have so many that are sick now, can you isolate those that are symptom-free? When I have an isolation room, and that seems to be constantly these days, I hang an old bathrobe just inside the door and leave a pair of slip-on shoes there also. I put those on as I enter the room, leave them behind as I exit and wash my hands well. Anything that has to come out of the room, such as dirty dishes, go straight into dishwasher/garbage/washing machine/whatever. It's really hard work, but you already know that.

Apart from that I can only suggest coming on PetTalk to vent and pouring yourself a good shot of whisky each evening when the work is done (for now). I'm really sorry you are going through a miserable time at present. It will pass.