[The Costantin Von Economo's lethargic encefalitis]
Starting from the Constantin Von Economo's description of a "new" disease, the lethargic encephalitis, the author delineates the history of an infectious sleeping sickness that caused epidemics in Europe from 1917 to 1928 and led to create, in Italy, the "Institutes for Encephalitis".
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Cattedra di Storia della Medicina dell'Universita degli Studi di Bologna, Italy.