• Open Access

Continuing progress towards a unified nomenclature for the highly pathogenic H5N1 avian influenza viruses: divergence of clade 2·2 viruses


Dr Ruben O. Donis, Molecular Virology and Vaccines Branch, Influenza Division, NCIRD, Centers for Disease Control & Prevention, 1600 Clifton Road, NE, MS-G16, Atlanta, GA 30333, USA. Email: rvd6@cdc.gov
Dr Gavin Smith, State Key Laboratory of Emerging Infectious Diseases, Department of Microbiology, The University of Hong Kong, Hong Kong SAR, China. E-mail: gjsmith@hku.hk