Paragraph 4 I1

England and Wales

Avian influenza viruses that are —

(a)

uncharacterised;

(b)

Type A viruses which have an intravenous pathogenicity index in six-week-old chickens of greater than 1.2; or

(c)

Type A viruses H5 or H7 subtype for which nucleotide sequencing has demonstrated multiple basic amino acids at the cleavage site of hæmagglutinin

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