Histopathology of lung tissue in passively treated mice.

<p>Photomicrographs of hematoxylin and eosin stained lung sections of mice treated with single or double doses of the combination of mAbs after post experimental viral infection with Clade 1 A/Vietnam/1203/2004 H5N1 virus at 6 days post challenge. A) Normal morphology seen in uninfected mice, B) infected and untreated mice, C) mice treated with a single dose of 5 mg/kg of ch-mAbs at 24 h post infection, D) mice treated with two doses of 5 mg/kg of ch-mAbs at 24 h and 72 h post infection.