Fig. 3
From: SARS-CoV-2 infection increases airway bleeding risk in patients after tracheostomies
Hematoxylin-eosin staining of sputum crusts. A-B: The HE staining revealed a large amount of mucus, necrosis, inflammatory exudate containing neutrophils and eosinophils, and a small number of squamous epithelial cells in the sputum crusts. Scale bars, 60Ā Ī¼m (A), 30Ā Ī¼m (B)