Mass psychogenic illness (MPI), also called mass sociogenic illness, mass psychogenic disorder, epidemic hysteria or mass hysteria, involves the spread...

In sociology and psychology, mass hysteria is a phenomenon that transmits collective illusions of threats, whether real or imaginary, through a population...

Mass Hysteria is a French heavy metal band formed in 1993. They have released eleven studio albums and four live albums in their 30-year career. Their...

The Tanganyika laughter epidemic of 1962 was an outbreak of mass hysteria—or mass psychogenic illness (MPI)—rumored to have occurred in or near the village...

Female hysteria was once a common medical diagnosis for women. It was described as exhibiting a wide array of symptoms, including anxiety, shortness of...

The 2023 Paris bedbug outbreak was a local infestation of bedbugs that took place in the French capital in the latter half of 2023. Reports of bedbug sightings...

theories behind the phenomenon, the most popular being stress-induced mass hysteria, suggested by John Waller. Other theories include ergot and religious...

The 2016 clown sightings were a case of mass hysteria [citation needed] fuelled by reports of people disguised as evil clowns in incongruous settings...

accounts as fact. The attacks are widely considered to be a case of mass hysteria. However, others maintain that the Mad Gasser actually existed, or that...

of a mass hysteria and a sequence of other circumstances eliminate the possibility that it might be poisoning. The main cause of mass hysteria was the...