I used to basically be sick in some form or another from the moment it got even slightly cold to the end of spring, just coughing and stuffed up and miserable, but never miserable enough to justify days off (I think I've taken about three or four in my entire working life). Then a couple of years ago it pretty much stopped, which is weird because I'm treating my body way worse than I ever used to. I think I got tougher! ?