Happiness Spreads like the Flu

Well here's some good news, courtesy of the Washington Post via O-No!.

"You would think that your emotional state would depend on your own choices and actions and experience," said Nicholas Christakis, a medical sociologist at Harvard University who helped conduct the study published online Friday by BMJ, a British medical journal. "But it also depends on the choices and actions and experiences of other people, including people to whom you are not directly connected. Happiness is contagious."

Duh.