MRSA
I work in a hospital and yes things like MRSA and VRE are rampid, I've even see the occasional TB patient, and plenty of C-Diff. MRSA can be in wounds, urine, lungs, nose, etc. And you would be shocked to find out who has it and where they have it. So do what TankAzz said and #1: wash your hands, #2: QUIT TAKING ANTIBIOTICS UNLESS THEY ARE PRESCRIBED TO YOU! And when you take them, take ALL of them as perscribed.
Giddy up!