title: Avian influenza, Viet Nam--update.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D018563:Disease Notification; D004196:Disease Outbreaks; D005260:Female; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology*; D014744:Vietnam / Q000453:epidemiology