PMC9389297_01
Autopsy section from the lung shows alveolar filling and expansion by numerous red blood cells and sparse filbrin there is no under lyinging vasuilities or alveloar capillarities (hemotoxylin and eosin,(A)scale bar = 200 mum (B)scale bar = 500 mum. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.).
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Microscopic examination of the lungs revealed marked congestion with many alveoli containing blood (Fig. 1).