The Weekly Epidemiological Record (WER) 27 February 2009, vol. 84, 9 (pp 65-76) includes: Recommended composition of influenza virus vaccines for use in the 2009-2010 influenza season (northern hemisphere winter);and Antigenic and genetic characteristics of H5N1 viruses and candidate vaccine viruses developed for potential use in human vaccines, February 2009

http://www.who.int/wer/2009/wer8409.pdf