Figure 2. Photomicrograph of the lung. A – multiple vasa interna thrombosis (black arrows) in the wall of a pulmonary artery, and fibrin thrombus in its lumen of the pulmonary artery (green arrow) in COVID-19 (H&E 10x20); B – thrombosis of arterioles (black arrows) and capillaries (blue arrow) of the lungs in COVID-19 (H&E 10x20); C – thrombi in the vasa vasorum interna (black arrows) and fibrin thrombus in the lumen of the pulmonary artery, COVID-19 (H&E 10x20); D – thrombosis of venule (black arrow) in COVID-19 (H&E 10x20).