“But if you go back to the Hippocratic oath that all doctors adhere to, it’s ‘First do no harm.’ So if you have a sign that says ‘Hey, look, here’s a really vulnerable person you’re about to walk in and see,’ then maybe a sign focused on that person will cue this larger core value in the physician to protect the patient.”

--Getting Doctors to Wash Their Hands

It's getting back to the idea that doctors are more concerned about their patients than themselves. oo.