ACE2 and COVID-19: Angiotensin-converting enzyme 2 (ACE2), which has been identified as a receptor for SARS-CoV-2 (25), is abundant in virtually all organs including the lung, kidney, liver, heart, and intestine (26); this implies that SARS-CoV-2 viremia could possibly infect any transplant organ and conceal itself until the immunosuppressed status exists.