There is increasing recognition that mass psychogenic illness (MPI) is underappreciated, under-reported and poses a significant health and social problem
There are two main types of MPI. The most common in Western countries (anxiety hysteria) is triggered by extreme, sudden stress within a close-knit group. It is usually triggered by a foul or unfamiliar odour that is perceived to be harmful. Symptoms are transient, benign and typically include dizziness, headache, fainting and over-breathing. Most victims recover within 24 hours and there is an absence of pre-existing tension within the group.
A histeria social por medos irracionais induzidos.