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Laughter is contagious

By Diane Deis Dec 22, 2021 | 6:19 AM

If you see two people laughing at a joke you didn’t hear, chances are you will smile anyway — even if you don’t realize it. According to a study, laughter truly is contagious: the brain responds to the sound of laughter and preps the muscles in the face to join in the gaiety.

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