title: An outbreak of influenza in four nursing homes in Sheffield.
mesh_terms: D000368:Aged; D000547:Amantadine / Q000627:therapeutic use; D000998:Antiviral Agents / Q000627:therapeutic use; D004196:Disease Outbreaks; D004739:England; D006707:Homes for the Aged; D006801:Humans; D009980:Influenza A virus / Q000302:isolation & purification; D007251:Influenza, Human / Q000453:epidemiology* / Q000517:prevention & control; D009735:Nursing Homes
chemical_list: D000998:Antiviral Agents; D000547:Amantadine