By , ,
Published October 18, 2015
We've all been victims of a yawning attack. It starts out with one person, and then makes its way across the room. Is yawning contagious?
[foxvideo 66403ad3-094f-431d-a550-c19e59979a3e]
https://www.foxnews.com/health/ask-dr-manny-why-we-yawn