@Jay , what PPE would you need? If the occupiers are not in the room with you, what is the risk?
Seriously, don't want to offend, but look up the WHO guidelines. Washing hands when entering and leaving, keeping distance from occupiers, should be sufficient. It's not like Tesco, where the checkout staff have a stream of strangers in front of them.
Edited to say: sorry, don't mean to sound callous. There is a lot of fear, understandable of course. No-one would willingly subject themselves to a 1% chance of dying. But you are providing an essential service, just as the supermarket workers are doing. Have a proper research, re-assure yourself, and take sensible precautions. Forewarned is forearmed, or something like that!
Stay safe,
CAB.