PIP: The author reports on a sample survey of 738 Tunisians, conducted to investigate the impact of preventive and social medicine on health and fertility. The sample population, drawn from the 1975 census, is described. Attention is given to the role played by information sources, particularly mass media, in preventive medicine, alcoholism and the prevention of traffic accidents, and public opinion concerning preventive medicine. Attitudes toward family planning are mentioned in the final section, and a copy of the questionnaire used is included.