This second part of a 2-part issue of Infectious Disease Clinics, edited by Michael S. Saag, MD and Henry Masur, MD, is devoted to HIV/AIDS. This issue will address the prevention of HIV/AIDS with topics such as: Mother to Child Transmission; Treatment as Prevention; Barrier and Microbicides; Prevention of HIV/AIDS: Pre-exposure Prophylaxis; Post-Exposure Prophylaxis; HIV Vaccine, and a final article addressing the cure of HIV/AIDS.