100 Years Ago, Thousands Fell Into a Deep Sleep With No Explanation. Today, It’s Still a Mystery.

100 Years Ago, Thousands Fell Into a Deep Sleep With No Explanation. Today, It’s Still a Mystery.

Yahoo health

Key Points:

  • Here's what you'll learn when you read this story:
  • Encephalitis lethargica (EL) is a mysterious neurological disease that impacted millions of people from 1917 to 1930, causing a wide range of symptom

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