their decision-making. The extent to which digital health has advanced, and is being used by medical professionals and patients, is at the core of this book. Digital Health: From Assumptions to Implementations addresses the emerging trends and enabling tools contributing to technological advances in 21st Century healthcare practice. These areas include generic topics such as mobile health and telemedicine, as well as specific concepts such as social media for health, wearables and quantified-self trends. Also covered are the psychological models leveraged in the design of solutions to persuade us to follow some recommended actions, the design and educational facets of the proposed innovations, as well as ethics, privacy, security and liability aspects influencing its acceptance. Furthermore, sections on economic aspects of the proposed innovations are included, analyzing the potential business models and entrepreneurship opportunities in the domain.