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 at large. Public health research, practice and policy are based on multidisciplinary activities, drawing from fields such as sociology, statistics, economics, psychology, social work, and clinical medicine.The Encyclopedia of Public Health is a summary of current knowledge in the field of public health. The work includes more than 2,500 entries in two volumes, written by international experts across the public health sciences. Entries consist of review-style articles (synopses), detailed essays and short definitions. Extensive cross referencing and hyperlinking offer an easy to use reference in Public Health.Solidly structured and inclusive, this two-volume reference is an invaluable tool for clinical scientists and practitioners in academia, health care and industry, as well as students and teachers.