Yep, my son worked with a 19 year old who chose to no longer work because he said he was "fearful of getting the virus." He wanted the Fed money. His position was replaced, and he was mad that they replaced him. He thought his spot would just stay open while he relaxed at home being paid.
As an employer you can't make them come to work if they have a fear or an underlying health concern. You can let them know it might be hard to find a job after all of this, if we go into a recession again and there are no jobs, so it might be good to keep the position you have.
I have a form my corporate is having me give to my employees letting them know since they are working with the public, there is a chance they could be exposed to Covid-19. At the end of the document they chose to stay home due to their doctors recommendation or fear of the virus, or they choose to continue to work.