One I had an infection, still unkown what it was, they thought it was MRSA at first but a nose culture did not detect
that, and after that blood work did not detect
it (or anything at all for that matter), and finally they had to cut out the infected area, they did a biopsy and found nothing wrong either. Now to preface this next thing let me say I also drink a LOT of red bull, cuban coffee, machiato, espresso, rock star to stay awake. I am pretty high tolerance.