In this video, David Wild asks the question: "how can data science help us all lead healthier lives?". The traditional physician-centric model is explained and challenged, given the big data world in which we now live. Questions are raised about what a patient, or people, centric model would look like. This is framed into three questions - how do I stay as fit and healthy as possible? How do I know when something is going wrong? How do I respond when something is going wrong?