ACE2 and COVID-19: Coronavirus disease 2019 (COVID-19) was a viral pandemic that emerged from the city of Wuhan, China, in December 2019 and quickly spread to the rest of the world.1The virus is transmitted from person to person through droplets and aerosols, as well as direct contact with the oral, nasal, and ocular mucous membranes.2The virus uses the angiotensin-converting enzyme 2 (ACE2) receptor to infect cells and cause tissue damage.