books.google.rs - Over the past century, we have made great strides in reducing rates of disease and enhancing people's general health. Public health measures such as sanitation, improved hygiene, and vaccines; reduced hazards in the workplace; new drugs and clinical procedures; and, more recently, a growing understanding...https://books.google.rs/books/about/Genes_Behavior_and_the_Social_Environmen.html?id=gFtYAgAAQBAJ&utm_source=gb-gplus-shareGenes, Behavior, and the Social Environment: