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The Last Time a Mass Medical Mystery Vanished Without Explanation, Nobody Noticed Until Decades Later

Encephalitis lethargica put 500,000 people to sleep and then quietly disappeared. The disclosure community should study how that happened.

Encephalitis lethargica put 500,000 people to sleep in the 1920s and vanished without explanation. The story of how science forgot about it is a template for how institutions handle phenomena they can't explain — and it has direct implications for how UAP is being processed right now.