Wood, John JHeath, AlanWorld Health Organization. Biologicals UnitWHO Expert Committee on Biological Standardization (2010 : Geneva, Switzerland)2012-06-172012-06-1720102010-12-31WHO/BS/10.2137https://iris.who.int/handle/10665/7058140 p.enInfluenza A Virus, H1N1 SubtypePandemicsAntibodies, ViralPharmaceuticals and BiologicalsReport of a WHO collaborative study to assess the suitability of a candidate international standard for antibody to pandemic H1N1 influenza virusimmunology