HAHAHAHAHA! No health care professionals take the stairs?!! Are you kidding? That counts as exercise, and who has time for that?! LOLOLOL!!! If anything, they're a place for interns to get lost. Or the dreaded last resort when an elevator never arrives.
In the way that there are two types of escalators - up escalators and down escalators - there are only two types of stairs - the up stairs and the down stairs. Walking down the up stairs or walking up the down stairs is strictly forbidden in most cultures.