title: Yellow fever. Investigation of an epidemic in Imo State.
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D002648:Child; D002675:Child, Preschool; D003625:Data Collection; D004196:Disease Outbreaks; D005260:Female; D006801:Humans; D015994:Incidence; D007223:Infant; D008297:Male; D008875:Middle Aged; D009549:Nigeria / Q000453:epidemiology; D017678:Sex Distribution; D015004:Yellow Fever / Q000453:epidemiology*