My neighbor works for the Feds, and one of his co-workers was talking about how he and his wife were keeping tabs on their temperatures. Turns out they had been to some event in a big city and were worried that they might have caught the bug. Soon after, both were down with it, after exposing a bunch of others, even though it's long been clear that you can spread it before you feel it yourself. Morons.
If their employer snapped their fingers and told them to stay home with pay they never would have came to work.
If it's serious, they'd do it. It's not, so they don't.