In an ideal world we would already be doing this. I know that some people have to show up to work even if they're sick, but even at my job where we have unlimited sick leave, and are encouraged to use it, people still show up coughing and sniffling.
I don't get it.
If your employer encourages you to work from home when you're sick, and you're actually sick, please work from home! No one wants to catch your disease, whether it's Coronavirus or "just" the common cold.