save yourself from getting yelled at
Because it's almost July, this one's for the new third-year med students. A general rule of thumb for those not scrubbed in the OR: if it's blue, don't touch.
I have my fair share of contamination stories from when I was a med student. Probably the worst of which was early in my third year, when I was scrubbed into a urology case, and I forgot I was sterile and reached up to scratch my nose.