People across Europe, North America slept for days or stared blankly for hours during this 100-year-old st
- Posted on June 13, 2026
- By Business News Today
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- 1 min read
People across Europe, North America slept for days or stared blankly for hours during this 100-year-old st
During the 1918 flu pandemic, a mysterious illness, encephalitis lethargica, emerged in Europe and North America, causing extreme sleepiness and immobility. Many survivors later developed Parkinson's-like symptoms. Despite overlapping with the flu, its exact cause remains unknown, baffling scientists for over a century. This enigmatic "sleeping sickness" epidemic continues to intrigue researchers.
