14 Weird Things That You Can Catch and Contagious

Fear
 You know how dread can spread rapidly through a crowd for no apparent reason? Now researchers have a clue as to why it might occur:When participants in one study smelled the sweat of a frightened person, they made fearful facial expressions and were more alert, suggesting that they caught the other person's fear. Researchers believe this response may help people survive by communicating info about looming threats.