Infect Someone Close to You...With Happiness!

A new study by researchers at UC San Diego suggests that good cheer is indeed contagious:

LONDON – When you're smiling, the whole world really does smile with you. A paper being published Friday in a British medical journal concludes that happiness is contagious — and that people pass on their good cheer even to total strangers. American researchers who tracked more than 4,700 people in Framingham, Mass., as part of a 20-year heart study also found the transferred happiness is good for up to a year.

"Happiness is like a stampede," said Nicholas Christakis, a professor in Harvard University's sociology department and co-author of the study. "Whether you're happy depends not just on your own actions and behaviors and thoughts, but on those of people you don't even know."...