The overarching theme of eHealth Week 2017 is Data for Health: the key to personalised sustainable care. Data lies at the heart of service delivery and the development of effective health policy. During eHealth Week, speakers and delegates will explore the changing ways in which personal health data is created, stored, shared and used. Advances in bioinformatics support a paradigm shift towards tailor-made prevention and treatment strategies both for individuals and population groups. Opportunities are growing for ICT to support patient-centred health services and the involvement of patients in their own care, including access to personal health data, sharing of data, and mHealth applications.