Misinformation lends itself to social contagion – here’s how to recognize and combat it

In 2019, a rare and shocking event in the Malaysian peninsula town of Ketereh grabbed international headlines. Nearly 40 girls age 12 to 18 from a religious school had been screaming inconsolably, claiming to have seen a “face of pure evil,” complete with images of blood and gore.

Experts believe that the girls suffered what is known as a mass psychogenic illness, a psychological condition that results in physical symptoms and spreads socially – much like a virus.

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