Session I.- 1 Introductory talk.- 2 Medical ethics and moral philosophy.- Session II.- 3 Evolution and mutation in medical ethics.- 4 Theoretical basis of disease prevention.- Session III.- 5 Development of preventive medicine and health promotion.- 6 Ethical aspects of public health legislation and the role of the state.- Subsidiary presentation Oregon health decisions.- Session IV.- 7 Ethical aspects of the economics of prevention.- 8 Ethical issues in descriptive and analytical epidemiology and in primary prevention.- Session V.- 9 Ethical issues in trials of prevention.- 10 Ethical issues of health promotion, health education, and behavioural control.- Session VI.- 11 Ethical issues in the activities of mass media communication in health education.- 12 Ethical issues in occupational health.- Subsidiary presentation Role of the company physician.- Session VII.- 13 Ethics, prevention, and child health.- 14 Ethical issues in mass screening procedures.- Session VIII.- 15 Ethical aspects of population control.- 16 Methods and procedures of ethical control.- Closing remarks.