At the first sign of sickness, Jenny Spring, 29, of Cambridge, Mass., practices another tactic linked to good health: “I tell myself that I refuse to be sick.” Is she crazy to think that works? Not at all. 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. Another study showed that people with sunny dispositions churned out more antibodies in response to vaccinations. 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. And a growing number of psychologists stress that focusing on wellness, as opposed to illness, can have good results. Read More