An unexpected benefit from enhanced 2009 H1N1 influenza surveillance.

Nosocomial outbreaks of influenza are reportable in New York State, but reporting compliance is unknown. We describe a surveillance system, instituted during the 2009 H1N1 outbreak, that coincidently allowed for the identification of influenza outbreaks in long-term care facilities. Published by Elsevier Inc. on behalf of the Association for Professionals in Infection Control and Epidemiology, Inc.