The first morning you wake up feeling as if a cold has moved in—you’re stuffy, a cough is brewing, and your brain is far from focused—you need unlimited access to rest. Don’t think you’ll be a hero if you drag yourself in to work; you’ll likely just feel lousy longer, says Chris D’Adamo, Ph.D., director of research at the Center for Integrative Medicine at the University of Maryland School of Medicine. And you’ll be spreading your germs: You’re most contagious for the first two to three days,