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. 2020 Jul 9;477(3):359–372. doi: 10.1007/s00428-020-02886-6

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© The Author(s) 2020

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Fig. 2 — Timeline of autopsy studies focusing on lung lesions in COVID-19 patients. Since the end of March, the increased number of full autopsies has led to a better knowledge of the pathophysiology of the disease. Together with the features of acute lung injury, vascular involvement has been reported. a, b Acute lung injury: hyaline membrane in alveolar space (hematoxylin and eosin stain, original magnification a × 100; b × 200). c, d Vascular damage: two microthrombi in lung small vessels (hematoxylin and eosin stain, original magnification × 200), capillary inflammation (hematoxylin and eosin stain, original magnification × 200). e Airway inflammation: tracheal section showing a polymorphous inflammatory infiltrate of the submucosal layers (hematoxylin and eosin stain, original magnification × 200)