Figure 6: Lung sections of GIII: (a) Nodular collection of heavy peribronchiolar infiltration of chronic inflammatory cells including lymphocytes, plasma cells, and eosinophils (yellow arrow). Bronchiolar wall displayed destruction, focal ulceration, thickened hyalinized basement membrane, and newly formed fibrous tissue. Area of fibrosis (red arrow), few foamy macrophages (black arrow), and wide dilated congested capillary were also detected on seventh dpi (H&E, ×400). (b) Peribronchiolar chronic inflammatory infiltrates including foamy macrophages, lymphocytes, plasma cells, and few eosinophils (arrow). The bronchiole showed destructed wall (asterisk) surrounded by dense newly formed fi brous tissue on the 12th dpi (H&E, ×400). (c) Mild destruction of alveolar architecture with emphysematous (yellow arrow), hemorrhagic changes and moderate cellular infiltrates (red arrow) on the 14th dpi (H &E, ×200).