| FULL DESCRIPTION |
The unitage assigned by the WHO to International Biological Standards -
substances, classed as biological according to the criteria provided by WHO
Expert Committee on Biological Standardization (e.g. hormones, enzymes, and
vaccines), to enable the results of biological and immunological assay
procedures to be expressed in the same way throughout the world. The definition
of an international unit is generally arbitrary and technical, and has to be
officially approved by the International Conference for Unification of Formulae.
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