1. Vincenzo Puro, MD, is Head of the Unit; and Francesco M. Fusco, MD, and Giuseppina De Iaco, MD, are Researchers; all in the Emerging and Re-emerging Infection Unit, Department of Epidemiology and Pre-clinical Research, National Institute for Infectious Diseases “L. Spallanzani,” Rome, Italy. Stefan Schilling, MD, is a Consultant, and Hans-Rheinhard Brodt, MD, is a Professor, both in the Department of Infectious Diseases, University Hospital Frankfurt, Frankfurt am Main, Germany. Gail Thomson, MD, MRCP,...