Epidemiology is a key discipline for understanding and improving public in PNG and throughout the world. It is increasingly important for health professionals (both clinical and non-clinical) to acquire skills necessary to find, understand and evaluate research information in this area. The unit is covers basic epidemiology principles, concepts, and procedures useful in the surveillance and investigation of health-related states or events. The unit also provides opportunity for students to familiarize themselves with basic biostatistics concepts and tools. Students learn how to select appropriate statistical tests for particular types of data. This unit generally prepares students to apply this knowledge to the evaluation of and control of health problems in the community.