In December 2019, new cases of severe pneumonia were first detected in Wuhan, China, and the cause was determined to be a novel beta coronavirus related to the severe acute respiratory syndrome (SARS) coronavirus that emerged from a bat reservoir in 2002. Within six months, this new virus--SARS coronavirus 2 (SARS-CoV-2)--has spread worldwide, infecting at least 10 million people with an estimated 500,000 deaths. COVID-19, the disease caused by...