I know what you mean - they would run a mile. I was off with food poisoning so bad I nearly ended up in hospital on a drip as I couldnt even keep water down - when I went back to work my manager asked me if I knew the effects my sickness had on the rest of the workforce - I wanted to tell her to f off!!! I couldn't even stand up! I wouldn't mind if I was one of those people who was off every Sunday morning but I am never off!!! Rant over!