1 Brian M. Gurbaxani and Pragna Patel are with the National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention (CDC), Atlanta, GA. B. M. Gurbaxani is also with the Departments of Electrical and Computer Engineering and Industrial and Systems Engineering, Georgia Institute of Technology, Atlanta. Andrew N. Hill is with the National Center for Emerging and Zoonotic Infectious Diseases, Division of Parasitic Diseases and Malaria, CDC, and the Department of Biostatistics and Bioinformatics, Rollins School of Public Health, Emory University, Atlanta. P. Patel is also with the Department of Medicine, Emory University.