In most EU countries you are not allowed to work and your employer will get into trouble if he lets you work when you've got a sick cert. Your employer obviously also has to pay you and is not allowed to fire you for getting sick[1].
If this outbreak causes the US to update its workers protections for the 21st century, at least something good will come out of it.
[1]: in some countries you can receive a reduction in pay after being sick for X months in a row, usually to ~60%.