Peter J Hotez1,2, K M Venkat Narayan3. 1. Department of Pediatrics, National School of Tropical Medicine, Baylor College of Medicine, Texas Children's Hospital, Houston. 2. Department of Molecular Virology & Microbiology, National School of Tropical Medicine, Baylor College of Medicine, Texas Children's Hospital, Houston. 3. Hubert Department of Global Health and Department of Epidemiology, Emory Rollins School of Public Health, Department of Medicine, Emory School of Medicine, Atlanta, Georgia.