In October 1967, a newspaper reported that some people were infected by a mysterious Koro disease from eating pork.
The news spread quickly among Singaporeans that consumption of pork would get the disease. Koro was then known to cause the male genitals to shrink which will lead to death.
As a result, hundreds of Singaporean men clutched on to their penises, and some even tied strings or attached clamps onto their genitals to prevent it from shrinking.
Panicking men flooded the Emergency department of Singapore General Hospital and the situation was so bad that the Health Ministry had to publicly assure Singaporeans that Koro was a result of fear and it is not a disease.