Weekly Epidemiological Record (WER)

9 October 2009, vol. 84, 41 (pp 420–436)

Contents
421 Recommended composition of influenza virus vaccines for use in the 2010 influenza season (southern hemisphere winter)
432 Antigenic and genetic characteristics of influenza A(H5N1) viruses and candidate vaccine viruses developed for potential use in human vaccines
436 WHO web sites on infectious diseases

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