Fan Death is still a strong living superstition in South Korea. This also seems to be the only country in the world with this particular superstition and I guess there are many explanations for this peculiar belief, including one that goes back to the early stages of the revolutionizing of marketing in South Korea.
Whatever the reason for the emergence of this belief is, it is a funny yet persistent one, and unlike so many other superstitions going around some other regions of the world, like don't open an umbrella inside a house because that's bad luck, the belief that a fan running in the house with all windows and doors closed can really kill, is very strongly believed.
