Essentials of Epidemiology</br>Epidemiology</br>Public health</br></br>Product Description</br></br>Successfully tested in the authors' courses at Boston University and Harvard University?? this text combines theory and practice in presenting traditional and new epidemiologic concepts. Broad in scope?? the text opens with five chapters covering the basic epidemiologic concepts and data sources. A major emphasis is placed on study design?? with separate chapters devoted to each of the three main analytic designs: experimen