Katharine Schilling and Rob Quick are with the Division of Foodborne, Waterborne, and Environmental Diseases, Waterborne Disease Prevention Branch, National Center for Emerging and Zoonotic Infectious Diseases, US Centers for Disease Control and Prevention, Atlanta, GA. Bobbie Person is with the Office of the Director, National Center for Emerging and Zoonotic Infectious Diseases, US Centers for Disease Control and Prevention. Sitnah H. Faith and Ronald Otieno are with the Safe Water and AIDS Project,...