Epidemiology is often considered the key scientific underpinning of public health practice this pivotal role of epidemiology was emphasized by the institute of medicine in its definition of the substance of public health as organized community efforts aimed at the prevention of disease and promotion of health with linkages to many disciplines and a scientific core of epidemiology 1 2 . Over the past decades epidemiology has made a relevant contribution to public health by identifying health problems and analysing their determinants however recent developments call for new and applied methods to support the planning implementation and evaluation of public health policies and programmes. Epidemiology for public health practice is a best selling text offering comprehensive coverage of all the major topics in introductory epidemiology and alignment to the core competencies in epidemiology for graduate and u learn more. Part two presents seven steps epidemiologists should follow to strengthen their contribution to the public health cycle conduct a needs assessment support priority setting formulate aims and objectives construct a logic model develop an evaluation plan perform quality control and analyse processes and outcomes