Fig. 4: Histological analysis of lungs at 3 days after SARS-CoV-2 infection of golden hamsters.

A, B Six-to-twelve-week-old mixed female and male golden hamsters (Mesocricetus auratus) were inoculated with 104 TCID50 of SARS-CoV-2 or carrier only (control) by an intranasal route of administration in a volume of 20 μL. Representative hematoxylin and eosin (A) and immunohistochemistry (IHC, B) photomicrographs of the lungs for each experimental group are shown. Original magnification, 20x for each figure.