Such widespread psychogenic illnesses as nausea and dizziness are

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Mass hysteria, also known as collective hysteria, collective obsessional behavior, or mass psychogenic illness, is a phenomenon where the illusion of a threat spreads among a large number of people, leading to symptoms of illness that have no identifiable physical cause. It often manifests in social groups and can include symptoms like nausea and dizziness, which are not attributable to any physical disease but rather to psychological factors.

Such Widespread Psychogenic Illnesses as Nausea and Dizziness Are