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Histological samples from post-mortem biopsies. (a) A small artery with evident hypertrophy on the muscular layer is present in the pulmonary interstitium. (Hematoxylin-Eosin 100X original magnification); (b) Alveoli show an exudate with hyaline membrane appearance (Hematoxylin-Eosin 200X original magnification; bar indicates 100 μm).
