The March 12 open seminar, organized by Sandro Galea, Robert A. Knox Professor and dean of SPH, took a scientific approach to understanding the rapidly spreading respiratory virus that has drastically upended life in the United States and around the globe. Total worldwide cases have surpassed 125,000, and more than 4,000 people have died, sparking widespread school closures, major public event cancellations, economic uncertainty, and fear and confusion about how to physically and financially adjust to the threat.