Dr. Wiktor is currently the Team Lead of the World Health Organization’s Global Hepatitis Programme which works with WHO Regional and country officials to promote the implementation of comprehensive viral hepatitis prevention and control programs. While working for the U.S. Centers for Disease Control and Prevention, he conducted research studies of HIV-1 and HIV-2 in Ivory Coast, West Africa and, in Tanzania, led the implementation of a large-scale HIV/AIDS prevention and treatment program. He is the author of more than 90 peer-reviewed scientific publications.