1. Infectious Disease Initiative Program, The Broad Institute of Harvard and MIT, 7 Cambridge Center, Cambridge, Massachusetts 02142, Drug Discovery and Development, Genzyme Corporation, Waltham, Massachusetts 02451, University of Puerto Rico School of Medicine, San Juan, P.R. 00936-5067, Department of Immunology and Infectious Disease, Harvard School of Public Health, 665 Huntington Avenue, Boston, Massachusetts 02115, Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School,...