Most of the world’s 34 million people living with HIV and AIDS reside in developing countries. In 2011, 2.5 million people became newly infected with HIV, and 1.7 million died of HIV-related illnesses. Sub-Saharan Africa accounted for 69% of all new infections and nearly half of all HIV-related deaths globally. While 8 million people worldwide can access treatment, nearly 7 million additional people in need of access did not have it as of 2011. Moreover, for every one person on treatment, two are infected. Without effective HIV prevention, the number of people requiring treatment will become unsustainable.