The Uneven Spread of HIV within Africa: A Comparative Study of Biological, Behavioral and Contextual Factors in Rural Populations in Tanzania and Zimbabwe • Ties Boerma, University of North Carolina at Chapel Hill ; Constance Nyamukapa, Biomedical Research & Training Institute ; Mark Urassa, TANESA project ; Simon Gregson, Wellcome Trust Centre for the Epidemiology of Infectious Disease

Moving and Marrying: HIV Infection among Newlyweds in Malawi • Michael D. Bracher, Royal Netherlands Academy of Arts and Sciences ; Gigi Santow, Royal Netherlands Academy of Arts and Sciences ; Susan Watkins, University of Pennsylvania

Social Networks, AIDS/STD Knowledge, and Risk Behaviors among Male Clients of Female Sex Workers in Bali, Indonesia • Kathy Ford, University of Michigan ; Dewa Wirawan, Kerti Praja Foundation ; Partha Muliawan, Kerti Praja Foundation

Understanding Perceptions of HIV Risk among Adolescents in Kwa Zulu-Natal • Naomi Rutenberg, Population Council ; Kate MacIntyre, Tulane University ; Lisanne Brown, Tulane University ; Ali Karim, Tulane University