Mass hysteria

Mass hysteria or mass psychological illness is a phenomenon where a large group of people share a common emotion.  This emotion can be positive, such as people being euphoric at a rock concert, or it can be negative, like after a great person or statesman died. 

The phrase "mass hysteria" was first used by the Quarteerly Christian Spectator in 1830, to describe an outbreak of cholera.The Journal of Health Conducted by an Association of Physicians (1831) p. 180

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Category:Symptoms
Category:Psychology
Category:Human behavior