The occurrence of psychogenic illness in a group of people at the same time. Examples include the biting manias and dancing manias that spread throughout parts of Europe between the 13th and 17th century.泛精神疾病：在一群人中同时出现的心理疾病。包括13至17世纪时席卷欧洲部分地区的疯咬症和舞蹈症