5. You have the flu. Ugh the flu, otherwise known as hell on earth mixed with a side of fever and never-ending head-to-toe pain. It’s not fun. If you have the flu, chances are you couldn’t make it into work even if you tried. But if you’re superhuman and/or in denial of your illness, going to work could get your entire team (and most people you pass during your commute) sick as well. You need to keep your germs to yourself and devote your time to resting and recovering. If you have a fever, you’re experiencing aches and chills then it’s best to get some sleep and stay hydrated at home.