title: Avian influenza. Outbreak in northern Vietnam baffles experts.
authors.forename: Dennis
authors.initials: D
authors.lastname: Normile
mesh_terms: D000818:Animals; D004196:Disease Outbreaks; D006801:Humans; D009980:Influenza A virus / Q000472:pathogenicity*; D005585:Influenza in Birds / Q000453:epidemiology / Q000821:virology; D007251:Influenza, Human / Q000453:epidemiology* / Q000401:mortality / Q000635:transmission / Q000821:virology*; D011200:Poultry; D014744:Vietnam / Q000453:epidemiology; D014774:Virulence