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Histology of nasal turbinates and lungs of mice following i.n. inoculations with control and mutant VACV. Groups (n = 3) of BALB/c mice were inoculated i.n. with 104 PFU of vD10rev, vD10stop, or vD10mu. Mice were sacrificed on day 7, and their organs were removed, fixed, embedded in paraffin, and sectioned. The sections were stained with hematoxylin and eosin (H&E) and with anti-VACV antibody for immunohistochemistry (IHC).
