Rapid emergence of a virulent PB2 E627K variant during adaptation of highly pathogenic avian influenza H7N7 virus to mice

Table 2 Gross pathology in lungs of ferrets infected with H7N7/03 virus

	Gross pathological lung lesions on indicated time p.i.
	Day 5			End of the study^a
Virus	No. of animals^b	No. of lobes	Area affected (%)	No. of animals	No. of lobes	Area affected (%)
chH7N7	2/3	1, 2	1, 3	3/4	1, 1, 2	1, 3, 3
maH7N7	3/3	1, 2, 3	3, 3, 5	3/4	3, 5, 6	10, 25, 30
mock	0/3	x	x	0/4	x	x

ISSN: 1743-422X