ACE2 and infection: The identification of angiotensin converting enzyme 2 (ACE2) as the entry point of the SARS-CoV-2 virus has led to an intense scrutiny of Renin-Angiotensin System (RAS) and its roles as part of SARS-CoV-2's infection process as well as RAS's role in the pathophysiology associated with COVID-19 infection.