The beginning of AIDS epidemic has been traced to a single event, localized rather precisely in place and time. David Quammen's book, The Chimp and the River: How AIDS Emerged from an African Forest explores these origins. Dr. John Russell's interview with David Quammen explores the real story of AIDS—how it originated with a virus in a chimpanzee, jumped to one human, and then infected more than 60 million people.
