Sounds like you have a bad cold, Don.Do you need some cough medicine?Nope.Tylenol?No thanks.Don't you want anything to help you feel better?I don't need help, Yael. All this sniffling, sneezing, and coughing are doing the work forme.But doesn't that make you feel worse?There's more than one way to look at sneezing and coughing.They can be symptoms, in which case your first reaction is to try to "cure" them with all sorts of pills and syrups.Or, you can see them as the body's natural defense system.It's called Darwinian medicine.You mean like survival of the fittest?Not exactly.Darwinian medicine tries to find evolutionary explanations for why we get sick.It also tries to figure out how and why we respond to sickness.