FIG. 5.

Photomicrographs of hematoxylin- and eosin-stained lung sections of mice infected with clade 2.1 H5N1 virus at 6 days postchallenge. (a) Infected and untreated mice. Normal morphology was seen in uninfected mice (b), infected mice treated with 5 mg/kg of 1C9 at 24 h postchallenge (c), infected mice treated with 10 mg/kg of 1C9 at 24 h postchallenge (d), infected mice treated with 5 mg/kg of 1C9 24 h prior to viral challenge (e), and infected mice treated with 10 mg/kg of 1C9 24 h prior to viral challenge (f).