Lassa fever.
D004196:Disease Outbreaks; D005260:Female; D006801:Humans; D008297:Male; D009549:Nigeria; D014777:Virus Diseases / Q000150:complications / Q000453:epidemiology* / Q000209:etiology / Q000473:pathology; D014713:Viruses, Unclassified / Q000302:isolation & purification