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Immunohistochemical staining for influenza virus nucleoprotein (brownish gold pigments) in lung sections (40× original magnification) of mice infected with 10 MLD50 of mouse adapted A/chicken/Thailand/NP-172/2006 (H5N1), clade 2, subclade 3 at 96 h post infection. (A–H) Infected mice treated with 10 mg/kg body weight of scFv21, PEN-scFv21, control scFv, control PEN-scFv, E. coli lysate, PAb to M1, PAb to H5N1 and rimantadine; (I) Infected mouse treated with PBS and (J) normal mouse.
