Health inequalities are avoidable, unfair, and systematic differences in health between different groups of people. Health inequalities are experienced between different groups of people and are often analysed across four main categories: socio-economic factors (for example, income); geography (for example, region); specific characteristics (for example, ethnicity or sexuality) and socially excluded groups (people who are asylum seekers or experiencing homeless). The effects of inequality are multiplied for those who have more than one type of disadvantage.