Notably, the plasma levels of adhesion molecules, such as ICAM-1, fractalkine, vascular cell adhesion molecule-1 (VCAM-1), vascular adhesion protein-1 (VAP-1), and vascular endothelial growth factor (VEGF), have been reported to be elevated among COVID-19 patients, especially in severe cases [51]. Here, AOC3 is linked to COVID-19.