Molecular characterization of a nosocomial outbreak of influenza B virus in an acute-care hospital setting.

We present evidence that InfB virus may spread within an acute-care hospital and that advanced molecular methods may facilitate assessment of the source and extent of the outbreak. We believe a multifaceted approach including rapid diagnosis, early recognition of outbreak situations, simple rules for patient management and the use of regular infection control measures may efficiently prevent nosocomial transmission of influenza virus.