ACE2 and COVID-19: It shares its mechanism of viral entry with other viruses of the Coronaviridae family as it is mediated by the spike (S) glycoprotein which binds to angiotensin converting enzyme 2 (ACE2) receptors that are localized in a variety of cell types, such as in the heart, liver, kidney, but most abundantly in the lungs and respiratory system (i.e., alveolar epithelial cells and capillary endothelial cells), leading to a wide range of various symptoms experienced by COVID-19 patients [3].