Credit: iStock In the spring of 2020, ACE2—angiotensin-converting enzyme 2—became a major focus of attention as the entryway of the coronavirus SARS-CoV-2, which is the virus that causes COVID-19. As of early November 2020, over 47 million cases of COVID-19 were confirmed worldwide, with more than 9 million cases in the U.S. Since the beginning … Continue reading How ACE2 Influences COVID-19 Severity in Older Adults