Evidence-based public health (EBPH) is the process of integrating science-based interventions with community priorities to improve population health. EBPH places a high priority on the views of community members. This focus can be seen as a population-based approach to public health, with the perspectives of the affected population at the forefront of decision-making about public health interventions. The term science-based encompasses many disciplines other than epidemiology that provide the scientific basis for public health, including sociology, psychology, toxicology, molecular biology, anthropology, nutrition, engineering, economics, political science, and others. Science-based is an intentionally broad term that encompasses quantitative and qualitative approaches to data collection that influence public health practice. The practice of EBPH is the development, implementation, and evaluation of effective public health programs and approaches through the systematic use of data and information systems and the application of principles of scientific reasoning, including the appropriate use of behavioral theory and program planning models. EBPH is based on principles of good practice, integrating good professional judgment with appropriate, systematic research. There is a strong appreciation for identifying evidence about the impact of various policies and programs on public health, translating that evidence into recommendations, and the extent to which that evidence can be used in public health practice. Health problems usually take place in the context of limited resources. Therefore, decision-makers should invest in proven, low-cost solutions. Evidence of the effectiveness of interventions such as programs, procedures or policies can be used to provide advice on the choice of a particular action or to justify the allocation of funds and other resources.