<unk>  (EL) is an atypical form of encephalitis. Also known as sleeping sickness (though different from the sleeping sickness transmitted by the tsetse fly), EL is a devastating illness that swept the world in the 1920s and then vanished as quickly as it had appeared. First described by the neurologist Constantin von Economo in 1916, EL attacks the brain, leaving some victims in a statue-like condition, speechless and motionless. Between 1917 and 1928, an epidemic of<unk>  spread throughout the world, but no recurrence of the epidemic has since been reported, though isolated cases continue to occur. During the outbreak over 5 million died from disease-related causes.
Encephalitis lethargica
Japanese encephalitis
Eastern equine encephalitis
Tick-borne encephalitis
Limbic encephalitis
Herpes simplex encephalitis
Varicella zoster encephalitis
La Crosse encephalitis