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books.google.com - From disaster relief to AIDS education, we see public health efforts in action around the world. While the field of medicine deals with the diagnosis and treatment of individual patients, public health focuses on population-level measures aimed at preventing disease and promoting the health of the society...https://books.google.com/books/about/Encyclopedia_of_Public_Health_2_Vol.html?id=eSPK7-CHw7oC&utm_source=gb-gplus-shareEncyclopedia of Public Health. 2 Vol.