An understanding of public health - the systems, policies and theories that influence the health of the population - is important for decision making across the continuum of care. Introduction to Public Health provides a solid introduction to the key concepts of public health for undergraduate health science students and those new to the public health environment. The text is divided into four sections, covering an overview of public health, the impact of policy and evidence, public health strategies and contemporary issues. With contributions from a multidisciplinary range of experts, this fifth edition has been updated to include emerging public health challenges such as COVID-19, the impact of globalisation, wellbeing and chronic illnesses, as well as a clear understanding of the multidisciplinary nature of public health.