1 Adedotun Ogunbajo is a postdoctoral fellow in the Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, MA, and Harvard Center for Population and Development Studies, Cambridge, MA. Kenneth H. Mayer is with the Division of Infectious Diseases, Beth Israel Deaconess Medical Center, Harvard Medical School, and Fenway Health, Boston. Phyllis J. Kanki is with Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston. Alexander C. Tsai is with Massachusetts General Hospital and Harvard Medical School, Boston.