An influenza outbreak in a hospital.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003428:Cross Infection / Q000453:epidemiology*; D004196:Disease Outbreaks / Q000453:epidemiology*; D006787:Hospitals, Veterans; D006801:Humans; D007223:Infant; D009980:Influenza A virus / Q000276:immunology; D007252:Influenza Vaccines / Q000627:therapeutic use; D007251:Influenza, Human / Q000175:diagnosis / Q000453:epidemiology* / Q000517:prevention & control; D011647:Puerto Rico
D007252:Influenza Vaccines