Your happiness can spread throughout your social sphere, if you believe the results of a recent study published in the BMJ, which suggests that your cheer can lift the spirits of your friends, your friends' friends, and even your friends' friends' friends. Researchers used data from the two-decade-strong Framingham Heart Study, an ongoing study that tracks the health and well-being of more than 5,000 Americans, and they found that one person's cheer can spread up to three degrees in a social network. Smile, and the world really does smile with you, kind of!
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