1. From the Broad Institute of Harvard and MIT (Y.B.-L., P.S.) and the Center for Systems Biology, Department of Organismic and Evolutionary Biology, Harvard University (P.S.) — both in Cambridge, MA; the Microbiology Laboratories and the Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital (E.R.), the Department of Pathology, Harvard Medical School (E.R.), and the Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health (P.S.) — all in...