Provided herein are antibodies that cross-react with hemagglutinin from strains of influenza virus of the same subtype or different subtypes, host cells for producing such antibodies, and kits comprising such antibodies. Also provided herein are compositions comprising antibodies that cross-react with hemagglutinin from strains of influenza virus of the same subtype or different subtypes and methods of using such antibodies to diagnose, prevent or treat influenza virus disease.
