Secrets of People Who Never Get Sick
In one study, participants who had heightened activity in a region of the brain associated with a positive attitude produced greater amounts of flu antibodies. Researchers aren't clear on the connection, but they do know "the brain communicates with the immune system, and vice versa," says Anna L. Marsland, PhD, director of the Behavioral Immunology Laboratory at the University of Pittsburgh.
Make it work for you: If you don't always think positively, experts say, you can at least learn to be less negative. Don't dwell on your symptoms when you do get sick, and try not to assume the worst (like telling yourself, "I always get sick this time of year" or "This cold blows the whole week"). "You probably can't change your personality," Marsland says, "but you can change your behavior."