Happy or Sad, a Mood Can Prove Contagious https://t.co/lekPOlSFhw https://t.co/mWFhkct4vN

Happy or Sad, a Mood Can Prove Contagious https://t.co/lekPOlSFhw http://pic.twitter.com/mWFhkct4vN

— Jerry Rosser (@psychologyofjoy) September 22, 2017