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. 2020 Nov 20;231:55–63. doi: 10.1016/j.trsl.2020.11.008

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Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

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Fig 1 — Graphs showing the comparison between the COVID-19, H1N1, and Control groups regarding MBL, TNF-alpha and ICAM-1 (in percentage per HPF). MBL tissue expression is higher in the pneumocytes (black arrows) of the COVID-19 case than in the H1N1 case. TNF-alpha is remarkably high in the alveolar septal cells (black arrows) of the COVID-19 case than in the H1N1 case. ICAM-1 tissue expression is higher in the pneumocytes (black arrows) of the COVID-19 case than in the H1N1 case. Alveolar lumens are identified with asterisks and hyaline membranes with arrowheads. Kruskal-Wallis test was used for P-values.