Dr. Preston A. Marx is a career virologist with over 25 years of experience in academic and research settings. He has published more than 190 research articles, 170 of which are on AIDS and HIV (Human immunodeficiency virus). He is professor of Tropical Medicine at Tulane University Health Sciences Center in New Orleans and the editor-in-chief of the Journal of Medical Primatology. His research is focused on AIDS, human immunodeficiency virus (HIV) and simian immunodeficiency virus (SIV) and simian models of AIDS. He gives lectures on the origin of HIV in Africa and HIV vaccines to scientists, health professionals and general audiences. On occasion, he provides consultation and advice on virology, AIDS vaccine development and anti-viral drug development.