Social epidemiologist Prof. Eric Emerson argues that "disability" and "being disabled" really refer to the effects of social and economic marginalisation of people with certain types of physical or mental impairments, and not the personal impact of the impairments themselves. While some societies have made strides in improving the lives of the people with impairments, we have yet to tackle our fundamental assumptions about disability and how it arises from the interaction between health conditions and the society in which we live. Presented by Lynne Haultain.