ECOHOST, the Centre for Health and Social Change, provides high quality evidence on the impacts of social change on health in the UK, Europe and globally through research, policy engagement and teaching. ECOHOST is also a WHO Collaborating Centre, and hosts the European Observatory on Health Systems and Policies which is a partnership between the World Health Organization Regional Office for Europe, the World Bank, the European Commission, research institutions and a number of country governments. Centre events examine the complex challenges related to health and social change.