[Between nihilism and fanaticism: the ethics of prevention].

Opinions diverge on the ethics of preventive medicine. A balance needs to be struck between nihilism (doing nothing) and fanaticism (doing too much). The authors consider the ethical aspects of preventive medicine from the practising physician's viewpoint. Various aspects can be identified: SCIENTIFIC AND METHODOLOGICAL: Like any medical act, preventive practice relies on good scientific data. The epidemiologic studies should be clinically relevant and their recommendations must be interpreted critically before being incorporated into clinical practice. It should not be forgotten that we are dealing with patients and their behaviour. Tactful dialogue and personalized intervention are essential. DEONTOLOGICAL: Modern medicine is oriented toward health maintenance and promotion, thus including prevention. Although the community has drawn obvious benefits from preventive practices such as the use of vaccines, prevention must not be allowed to become a medical tyranny. Respect for the individual should remain its central concern. ETHICAL: The "meaning of life" must not be forgotten. Factors such as quality of life should always be kept in mind in measuring the benefits of prevention. By providing objective information and tailored counselling, the aim of prevention is to encourage expression of the individual's own responsibility for her/his own health. FINANCIAL: Preventive medicine is not covered by health insurance schemes. Cost-benefit analysis should consider not only the economic aspects of prevention but also its positive impacts on the entire social field. SOCIAL AND CULTURAL: The findings of epidemiologic studies must be adapted to precise socio-cultural environments. In our culture, for example, caregivers should be the first to practise what they preach. It must also be remembered that at the present time the basic preventive measures are still not accessible to everyone.