The practical relevance of health communication is now undisputed. However, in the past, the theoretical foundation of research has often been neglected. This volume addresses this issue through theoretical reflections and current empirical studies. It discusses ethical aspects in the field of health-related journalism as well as challenges in designing health campaigns. The contributions also explore the persuasive effects of health messages and the influence of health communication on the perception and attitudes towards health-related topics. Additionally, it examines health communication on the internet and technology-supported interventions for health promotion, which are becoming increasingly important due to the proliferation of smartphones and mobile devices. The topics are addressed in a theory-driven manner.