HIV and AIDS / Benigno Rodríguez and Robert A. Salata -- Hepatitis C / Luciléia Teixeira and David Bobak -- Emerging viral respiratory illnesses / Nandhitha Natesan and Rana B. Hejal -- Tuberculosis / G. Scott Mahan and John L. Johnson -- Malaria / Arlene Dent and Charles H. King -- Diarrheal disease / Keith B. Armitage and Dalia El-Bejjani