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The happiness virus

Happy people tend to have happy friends. That may or may not mean happiness is contagious.

By Julie Rehmeyer

- More than 2 years ago

It’s too good an idea to resist: Happiness is contagious. A new study published online Dec. 4 in the British Medical Journal shows it.

HAPPY CLUMPS Yellow nodes represent happy people, green ones moderately happy people, and blue ones people thought to be somewhere between.