Patients Hospitalized With Laboratory-Confirmed Influenza During the 2010-2011 Influenza Season: Exploring Disease Severity by Virus Type and Subtype

Abstract

During the 2010-2011 season, pH1N1 caused more severe disease than H3N2 or B in hospitalized patients. Underlying medical conditions increased severity despite virus strain. Antiviral treatment reduced severity among adults. Our findings underscore the importance of influenza prevention.