Figure 5

H&E staining for histopathological analysis of lung tissues of mice infected with 106.0 EID50 of ZJ-SW19 on 3, 6, and 9 dpi. Mice displayed mild or moderate interstitial inflammatory congestion and exudative lesions, accompanied by inflammatory cells (diamond) and RBC infiltration (triangle). A, B, C, and D show sections from the control, 3 dpi, 6 dpi, and 9 dpi groups, respectively.