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Histopathological examination of lung tissues from ferrets infected with HPAI or LPAI H7N8 influenza virus. Representative images of hematoxylin and eosin-stained lung tissues from ferrets inoculated with 106.0 EID50 of HPAI H7N8 influenza virus on day 3 p.i. (A) and day 10 p.i. (B), from ferrets inoculated with LPAI H7N8 influenza virus on day 3 p.i. (C), and from naive ferrets (D) are shown under ×100 magnification.
