Health inequalities can be defined as differences in health status or in the distribution of health determinants between different population groups. For example, differences in mobility between elderly people and younger populations or differences in mortality rates between people from different social classes. Some health inequalities are attributable to biological variations or free choice and others are attributable to the external environment and conditions mainly outside the control of the individuals concerned. It is important to distinguish between inequality and inequity in health.
WHO Health Impact Assessment: Glossary of terms used/ Health inequality and inequity https://www.who.int/hia/about/glos/en/index1.html Accessed 06 January 2020