Embed from Getty Images Even if mental illness i...  ...anual labor. Two especially bizarre cases of mass hysteria involved meowing and biting nuns.In the first cas...  ...ng threatened with a beating by soldiers. Mass hysterias are not limited to isolated groups, though, or ev...

The following is an article from Uncle John's Slig...  ...ere "5 percent hoodlum-ism, and 95 percent public hysteria ." Puget Sound residents had become participants i...  ...llective delusion, sometimes referred to as "mass hysteria ." To this day, sociologists and psychologists ref...

Mass hysteria is when delusions or other symptoms of mental ill...  ...r Medical Emergency dismissed the illness as mass hysteria . This story concerned some parents because of the...