It is incredibly selfish to be around others or work when you are that sick. Some people think it makes them a "trooper" or makes them seem dedicated and a fighter. It makes them an asshole- just an ill asshole. I am direct about cold and flu season. When I go to 12 step meetings where everyone holds hands at the end, I tell people that during cold and flu season I will grab their arms but not hold their hands. If I am sick I step back from the circle and own it.