Is knowledge dangerous?

      Last week I developed a sore throat and started getting a few white patches on the back of my throat, along with a runny nose.  It didn't turn into anything major (thanks to the tried-and-true remedy of warm saltwater gargles), but before I was better someone in one of my classes asked me if I was getting sick so I mentioned it to them.  It turns out that they too are interested in a medical career, and made a comment about how, once you start learning about different diseases, you turn into a hypochondriac.  I was somewhat taken aback by this, but didn't pursue it further since class was about to start.  Later, I gave it some thought, and realized that there was some validity to it, but that it misrepresents the reality, at least for me.