Fig. 4

A Lung biopsy tissue showed a large number of fibrin were filled in the alveolar cavity, accompanied by acute inflammatory cells. There were no hyaline membranes or pulmonary edema. (HE, × 40). B Myofibroblasts proliferated in some alveolar cavities, showing the change of organic pneumonia. (HE, × 200). C EBV-positive activated lymphocytes in pulmonary interstitium. (In situ hybridization EBERs, × 200)