Happiness is contagious. The more happy people you know, the more likely you are yourself to be happy. And getting connected to happy people improves a person's own happiness, [a research team] reported in the British Medical Journal. What we are dealing with is an emotional stampede," Nicholas Christakis, a professor of medical sociology at Harvard Medical School in Boston, said. Christakis and James Fowler, a political scientist at the University of California, San Diego, have been using data from 4,700 children of volunteers in the Framingham Heart Study, a giant health study begun in Framingham, Massachusetts in 1948. They have been analyzing a trove of facts from tracking sheets dating back to 1971, following births, marriages, death, and divorces. Volunteers also listed contact information for their closest friends, co-workers, and neighbors. They assessed happiness using a simple, four-question test. "People are asked how often during the past week, one, I enjoyed life, two, I was happy, three, I felt hopeful about the future, and four, I felt that I was just as good as other people," Fowler said. The 60 percent of people who scored highly on all four questions were rated as happy, while the rest were designated unhappy. People with the most social connections -- friends, spouses, neighbors, relatives -- were also the happiest, the data showed. "Each additional happy person makes you happier," Christakis said. "It is not just happy people connecting with happy people, which they do. Above and beyond, there is this contagious process going on." And happiness is more contagious than unhappiness, they discovered.

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