Mar 13, 2014 6:42 AM by Lindsay MacLeod, KSBY News
Your bad cold can't be contagious to your Facebook friends, but your mood can!
A new study of more than a billion Facebook posts found emotions easily spread online, especially cheerful ones.
Researchers found each negative status led to 1.29 more negative posts among friends.
Positive updates led to 1.75 more positive posts.
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