[quote=So Boerd]
Outside of communism, most mental illness cannot be spread which is why we treat physical illness more severely, but other than that I think we should get guidelines from professionals on exactly when to take mental health days.
[/quote]

True in regards to being contagious.
But days off can still be granted for things such as injuries or broken limbs, but mental harms are usually ignored unless if it's the death of a loved one.