I'm a Medical Assistant at a pediatrics office, been there a year. I'm already desensitized. I think having to collect stool (or poop as you parents call it) from a diaper that reeks of rotavirus in it has desensitized me pretty good. Not to mention blood, spit up, vomit, drool, same as you've all seen/touched/tasted.
for those of you not in the know..
http://www.webmd.com/content/article/119/113193.htm (explains rotavirus)