[Carcinogenic risks and prevention of cancer (author's transl)]

Epidemiologic studies supported by experimental research have made it possible to draw up an epidemiological outline of the different types of cancer. From the standpoint of prevention, carcinogenic factors can be investigated according as they apply to collective or individual life, according to their relative etiological importance, and to the incidence rate and gravity of cancers involved. The most efficient procedures concerning about more than 50% of human cancers appear to be the campaigns against tobacco and alcohol consumption, systematic screening and treatment of precancerous lesions of uterine cervix and changes in the nutritional habits.