Only put out a couple ketchup packets every once in a while so people can’t take all of them up til you get more
B) ethical practice of medicine
the Hippocratic Oath (named after Hippocrates, the father of modern medicine) entails things such as treating a patient as a whole, not just as the illness, not playing at God while treating a patient, etc.
Yellow fever is an acute viral haemorrhagic disease transmitted by infected mosquitoes. The "yellow" in the name refers to the jaundice that affects some patients.