title: The 2009 H1N1 pandemic adds to our knowledge of influenza pathogenesis.
authors.forename: David H
authors.initials: DH
authors.lastname: Walker
mesh_terms: D000818:Animals; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000472:pathogenicity*; D007251:Influenza, Human / Q000453:epidemiology* / Q000401:mortality; D009976:Orthomyxoviridae Infections; D058873:Pandemics