Public health sciences is a multidisciplinary field. In recent years, the field has developed rapidly as a science, education field and practice. The field develops and systematizes knowledge about public health and the factors that influence public health, as well as proposes measures designed to preserve and improve health. The perspectives are local, regional, national, European and global. Central knowledge and competence areas in any study programme in public health are social perspectives and population-oriented public health efforts, as is the knowledge of methodologies from different scientific areas with relevance to public health sciences. Sweden has a long tradition of conducting work that influences public health and the average length of life, which has doubled since the 18th century.