With respect to diffuse alveolar damage in #SARS-CoV2
formation of fibrin thrombi has been observed anecdotally but not studied systematically
Clinically, many patients have elevated D-dimer levels,
cutaneous changes in their extremities suggesting thrombotic microangiopathy
Diffuse intravascular coagulation and large-vessel thrombosis have been linked to multisystem organ failure

Pulmonary #Vascular #Endothelialitis, #Thrombosis, and Angiogenesis in #COVID19
- PMC

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https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7412750/