What is the meaning of sleepy sickness?

An encephalitis that was epidemic between 1915 and 1926; symptoms include paralysis of the extrinsic eye muscle and extreme muscular weakness.
- synonyms: sleeping sickness, epidemic encephalitis, lethargic encephalitis, encephalitis lethargica

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APA	WordNet. (2010). sleepy sickness. Retrieved September 21, 2026, from http://smartdefine.org/sleepy_sickness/definitions/1311277
Chicago	WordNet. 2010. "sleepy sickness" http://smartdefine.org/sleepy_sickness/definitions/1311277 (accessed September 21, 2026).
Harvard	WordNet 2010, sleepy sickness, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/sleepy_sickness/definitions/1311277>.
MLA	WordNet. "sleepy sickness" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/sleepy_sickness/definitions/1311277>

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