The fund that fights killer diseases such as TB and Aids needs to build on its success, but it is facing a fiscal crisis. World leaders will come together at the United Nations in September in order to accelerate progress towards the Millennium Development Goals (MDGs). Three of the eight MDGs involve bringing primary health services to the entire world’s population. A small amount of global funding, if well directed, could save millions of lives each year. The key step is to expand the Global Fund to Fight Aids, Tuberculosis, and Malaria into a Global Health Fund.