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Ann Intern Med. 1933;7(2):267-271. doi:10.7326/0003-4819-7-2-267
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This excerpt has been provided in the absence of an abstract.

Prior to the first waves of the great epidemic of lethargic encephalitis the medical literature contained relatively few references to the non-suppurative inflammations of the brain. Our knowledge of encephalitis, as Zappert has rightly said, falls historically into three periods: before the epidemic, during its height, and since. This third period, which is still in progress, should be of lively interest to the clinician.

It seems probable that since the onset towards the end of the war of the first epidemic of lethargic encephalitis (Economo's disease), the frequency not only of this condition but of other forms of encephalitis as




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