title: Infectious diseases. As swine flu circles globe, scientists grapple with basic questions.
authors.forename: Jon
authors.initials: J
authors.lastname: Cohen
authors.forename: Martin
authors.initials: M
authors.lastname: Enserink
mesh_terms: D000818:Animals; D000998:Antiviral Agents / Q000600:supply & distribution; D002487:Centers for Disease Control and Prevention, U.S.; D004196:Disease Outbreaks; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000145:classification / Q000235:genetics / Q000472:pathogenicity; D007252:Influenza Vaccines / Q000600:supply & distribution; D007251:Influenza, Human / Q000453:epidemiology* / Q000635:transmission / Q000821:virology; D008800:Mexico / Q000453:epidemiology; D009976:Orthomyxoviridae Infections / Q000662:veterinary / Q000821:virology; D013552:Swine; D013553:Swine Diseases / Q000821:virology; D014481:United States / Q000453:epidemiology
chemical_list: D000998:Antiviral Agents; D007252:Influenza Vaccines