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Public health activities were channeled almost strictly into research and disease, prevention, while all therapeutic activities were reserved for the medical community. We only have time to mention a few of the important federal actions related to public health during the past half century. The Great Depression, 1929 to W.W.II, during the administrations of F.D.R., saw the federal government expand its functions more rapidly and broadly than in all preceding American history, including in the field of public health.