Horrible position to be in.
I guess in the first instance I would ask the company you work for what measures they have in place in order to keep you safe at work.
That's not an unreasonable question to ask.
Next thing I'd be inclined to do would be investigate what an insurance plan with returning to work in the current climate would cost. And then suggest you'll return to work if the company will pay for it.
Again. Not an unreasonable request.
Once you know the answer to those questions you'll have a better idea on where you stand and how to move forward.