1. From the Divisions of Pulmonary and Critical Care Medicine (W.A.F.) and Infectious Diseases (D.A.W.), University of North Carolina at Chapel Hill, Chapel Hill; Integrated Research Facility, Clinical Monitoring Research Program Directorate, Frederick National Laboratory for Cancer Research, Frederick, MD (I.C.); the UK Public Health Rapid Support Team, Public Health England, and the London School of Hygiene and Tropical Medicine, London (D.G.B.), and the Department of Clinical Sciences, Liverpool School...