Presents abstracts of the lectures presented during plenary sessions at the 12th Annual Meeting of the European Public Health Association in Oslo, Norway from October 6 to 8, 2004. "Social Inequalities in Health in Europe: From Explanation to Prevention," by Johannes Siegrist; "Health Promotion for Children and Youth in a Changing Europe," by Thomas Zeltner; "How Important is Daily Physical Activity to Public Health? Data Analyses From the Amsterdam Growth and Health Longitudinal Study," by Han C. G. Kemper; "Predisposed Illness? The Human Genome, Environmental Exposure and Public Health," by Camilla Stoltenberg.