Just 6 months ago, the novel coronavirus now known as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and COVID-19, the severe disease it causes, were unheard of. Today, this highly contagious and dangerous virus and the widespread virulent disease it causes have resulted in major disruptions of business, education, and transportation, and have permeated and interrupted virtually every aspect of daily life. Millions of people have been affected by COVID-19, hundreds of thousands have experienced critical illness, and tens of thousands have died. Physicians, other health care professionals, and health care systems around the world have been challenged like never before in recent history.