Abstract
A strategy for health improvement should include personal health care, environmental control measures, and means of influencing health–related behavior. All three of these ways of improving health are applicable in the present state of knowledge to most major health problems, including trauma from automobile accidents, dental caries, myocardial infarction, lung cancer, and infant deaths. Research as an integral part of this strategy should be directed toward both what to do and how to do it. The problems of dental caries and lung cancer are examined in some detail to indicate the role of research in a strategy for health improvement.

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