preamble_211
Council Directive 80/217/EEC of 22 January 1980 introducing Community measures for the control of classical swine fever · European Union
For the application of the direct immunofluorescence test the following requirements shall be adopted: (a) hyperimmune serum shall be prepared from pigs free from infections or antibody which could affect the specificity or quality of the reaction;
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Source: EUR-Lex (Cellar) · retrieved 2026-11-09 · Text as adopted (Official Journal); later amendments are not incorporated in this text.