Happiness Can Spread Like a Contagion, Study Indicates | WaPo
The study of more than 4,700 people who were followed over 20 years found that people who are happy or become happy boost the chances that someone they know will be happy. The power of happiness, moreover, can span another degree of separation, elevating the mood of that person's husband, wife, brother, sister, friend or next-door neighbor.
"You would think that your emotional state would depend on your own choices and actions and experience," said Nicholas A. Christakis, a medical sociologist at Harvard University who helped conduct the study published online today 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."
Source: WaPo
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