||Annotation The WHO Expert Committee on Biological Standardization is commissioned by WHO to establish detailed recommendations and guidelines for the manufacturing, licensing, and control of blood products, cell regulators, vaccines and related in vitro diagnostic tests. Members of the Expert Committee are scientists from national control agencies, academia, research institutes, public health bodies and the pharmaceutical industry acting as individual experts and not as representatives of their respective organizations or employers. The decisions and recommendations of the Committee are based entirely on scientific principles and considerations of public health. The Expert Committee on Biological Standardization meets on an annual basis since 1947 and is reponsible for the establishment of the WHO International Biological Reference Preparations and for the adoption of the WHO Recommendations and Guidelines. The Expert Committee directly reports to the Executive Board, which is the executive arm of the World Health Assembly.