In 1993, Helen Epstein, a scientist working with a biotechnology company searching for an AIDS vaccine, moved to Uganda, where she witnessed firsthand the suffering caused by the epidemic. Now, in her unsparing and illuminating account of this global disease, she describes how international health experts, governments, and ordinary Africans have struggled to understand the rapid and devastating spread of the disease in Africa, and traces the changes wrought by new medical developments and emerging political realities. It is an account of scientific discovery and intrigue with implications far beyond the fight against one tragic disease. The AIDS epidemic is partly a consequence of the rapid transition of African societies from an agrarian past to an impoverished present.