title: 1918 influenza, encephalitis lethargica, parkinsonism.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks / Q000266:history*; D004671:Encephalitis, Arbovirus / Q000453:epidemiology / Q000209:etiology* / Q000266:history*; D005260:Female; D049673:History, 20th Century; D006801:Humans; D014905:Independent State of Samoa; D007223:Infant; D007251:Influenza, Human / Q000453:epidemiology / Q000209:etiology / Q000266:history*; D008297:Male; D008875:Middle Aged; D009975:Orthomyxoviridae; D010301:Parkinson Disease, Postencephalitic / Q000453:epidemiology / Q000209:etiology / Q000266:history*; D011247:Pregnancy; D014481:United States; D014861:Washington