Johan H. Melendez, Tong Yu, Sarah L. Williford, Gretchen S. Armington, Barbara Silver, Charlotte A. Gaydos, and Yukari C. Manabe are with the Johns Hopkins School of Medicine, Baltimore, MD. Elizabeth A. Gilliams and Matthew M. Hamill are with the Baltimore City Health Department, Baltimore, MD. Adam Huebner is with the Office of Global AIDS Coordination, US Peace Corps, Washington, DC.