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This book traces the social and environmental determinants of human infectious diseases from the Neolithic to the present day. Despite recent high profile discoveries of new pathogens, the major determinants of these emerging infections are ancient and recurring. These include changing modesof subsistence, shifting populations, environmental disruptions, and social inequalities. The recent labeling of the term re-emerging infections reflects a re-emergence, not so much of the diseases themselves, but rather a re-emerging awareness in affluent societies of long-standing problems thatwere previously ignored.An Unnatural History of Emerging Infections illustrates these recurring problems and determinants through an examination of three major epidemiological transitions. The First Transition occurred with the Agricultural Revolution beginning 10,000 years ago, bringing a rise in acute infections as themain cause of human mortality. The Second Transition first began with the Industrial
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