ACE2 and pulmonary embolism: ACE2 is also expressed by endothelial cells [41], and other major clinical events usually observed in COVID-19 patients (e.g., high blood pressure [42], thrombosis [43] kidney disease [44], pulmonary embolism [45], cerebrovascular, and neurologic disorders) [46] indicate that the virus is targeting the endothelium, one of the largest organs in the human body [47].