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9 Rarest Medical Conditions in the World

Whether a disease is common or rare doesn’t make it any better or worse for the person who is suffering from it, but in the case of a rare disease, it may take a doctor longer to properly diagnose it—and there may not be as many treatments available as there are for more common diseases.

Some diseases are incredibly rare, but can also be deadly or severely impact quality of life. They can also be traced to lifestyle, with some of them occurring outside the U.S. With that being said, here are nine of the rarest diseases worldwide…


1. Kuru

TopTenz.net explains that Kuru is one disease that isn’t found in North America. In fact, it’s confined to a tribe in New Guinea. The disease, which causes the victim to lose the ability to eat or even stand (and then dying in a comatose state a year or less later), is said to be the result of diet.

Apparently, this particular highland tribe partakes in cannibalism—consuming cooked brains and other body parts. While Kuru wiped out more than 1,000 people in the 1950s and 1960s, government intervention has wittled that number down to almost nothing, according to the source.

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