Rare Diseases You Have Never Heard Of

Science has made big advances in medicine to tackle some of the deadliest diseases imaginable. But there are still some diseases out there that have left humans completely puzzled. Some of these diseases affect our body in ways that are completely unexplained or unusual. The European Organization for Rare Diseases defines a rare disease as one with a prevalence of 1 in 2,000 people or less. Here are some rare illnesses you’ve probably never heard of.

Encephalitis Lethargica


This disease was quite terrifying when it hit in the early 1900’s. Suffers from this disease have vivid hallucinations before their bodies seemingly become paralyzed. The victims will appear to be asleep, however still be fully conscious. Few victims die at this stage, however if they don’t, they experience behavioral problems for the remainder of their lives.

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