Fig. 2

Histopathological changes in the lung in COVID-19 pneumonia; a Alveolar damage, congestion, inflammation (HE × 100); b pneumocyte hyperplasia, interstitial fibrosis (HE × 400), c early fibrotic changes, fibrinous, organized pneumonia (HE × 100), d noncaseating suppurative granulomatous inflammation with neutrophils (HE × 100), e inflammation consisted rich in CD3 positive lymphocytes (HE × 40), f interstitial fibrosis was confirmed with Masson Trichrome histochemical stain (HE × 100)