One of the things that I was warned against was that I would get diarrhea. Before I left home I want to the travel center and got some preventative medicine. You take one before each meal. I was careful about not eating at roadside stands. Occasionally I would forget to take one and then after 11 days I ran out. NOTHING BAD CAME OUT if you know what I mean. Maybe my body developed a tolerance after a little while.
Another thing I was warned about was to not rinse my mouth or toothbrush with un treated water. At first I followed this religiously but after a while I got sloppy and again Nothing came of it.