Figure 1.

Detection of ACE2 and SARS‐CoV S protein in the lung and bronchial tissues by IHC. The MAbs against human ACE2 and the SARS‐CoV S protein were used to detect the expression of ACE2 (a–i to a–iv and c–i to c–iv) and SARS‐CoV S protein (b–i to b–iv and d–i to d–iv) in monocytes/macrophages and pneumocytes (a–i to d–i), bronchial epithelial cells (a–ii to d–ii), bronchial serous gland epithelium (a–iii to d–iii), and bronchial serous gland epithelium‐AB (a–iv to d–iv) in the SARS patients (a–i to b–iv) and control subject (c–i to d–iv). All sections were counter‐stained with haematoxylin, except the sections of bronchial serous gland epithelium‐AB, which were counter‐stained with haematoxylin and Alcian blue