(b)
Council Directive 2005/94/EC of 20 December 2005 on Community measures for the control of avian influenza and repealing Directive 92/40/EEC · European Union
avian influenza viruses with an intravenous pathogenicity index in six-week old chickens greater than 1.2;2;
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Source: EUR-Lex (Cellar) · retrieved 2026-11-04 · Text as adopted (Official Journal); later amendments are not incorporated in this text.