Health equity means that everyone has a fair opportunity to achieve their highest attainable level of health and that avoidable, unfair or remediable differences in health between groups are reduced or eliminated. The World Health Organization defines health equity in terms of the absence of unfair, avoidable or remediable differences among groups distinguished by social, economic, demographic or geographical characteristics. The concept therefore concerns more than whether healthcare exists: it also concerns whether people have the conditions, opportunities, resources and support necessary to benefit from healthcare and maintain health. Health equity can involve differences associated with income, education, occupation, housing, geography, ethnicity, disability, sex, gender, age and other social circumstances.
Health equity is closely related to, but not identical with, health equality. Equality generally means providing the same thing to everyone, whereas equity recognises that people may have different needs and face different barriers. Giving every population exactly the same service does not necessarily produce equitable outcomes if some groups encounter additional obstacles to accessing or benefiting from it.
For example, providing identical written health information to everyone may not be equitable if some people require translation, accessible formats or communication support. Equity therefore involves fair distribution according to need and attention to circumstances that create avoidable disadvantage. This does not mean that every person should have identical health outcomes, because health is influenced by biological variation, personal circumstances and factors that cannot all be eliminated.
A major part of health equity is understanding the social determinants of health. These are the conditions in which people are born, grow, live, work, play and age, together with the systems and structures that shape those conditions. Income, education, employment, housing, transport, food security, social protection, discrimination and environmental conditions can influence exposure to health risks and the ability to obtain effective care. WHO describes structural determinants, including political, legal and economic arrangements, social norms and institutional processes, as influences on the distribution of power and resources. Consequently, improving health equity may require action outside healthcare itself, including education, housing, employment, social protection, environmental policy and measures addressing discrimination.
Health inequity can arise at several stages. People may have unequal exposure to harmful conditions, unequal susceptibility to illness, unequal access to preventive or therapeutic services, unequal experiences within healthcare, or unequal ability to recover after illness. Geographic distance can make services harder to reach; financial constraints can limit access where healthcare involves charges; language or communication barriers can affect understanding; disability can make buildings or information inaccessible; and discrimination can affect interactions with institutions. Health systems can therefore influence equity through service location, opening hours, appointment systems, transport arrangements, affordability, accessibility, culturally appropriate communication, workforce distribution and continuity of care. Monitoring differences between population groups helps identify where these mechanisms are producing systematic disadvantages.
Health equity is not the same as eliminating every difference in health. Some differences arise from genetics, age, biological processes, individual preferences or chance and are not necessarily inequitable. The term inequity carries a stronger meaning than simple variation because it concerns differences considered unfair and avoidable or remediable. A useful distinction is therefore between a health difference that can be measured and a health inequity that additionally involves an assessment that the difference is unfair and capable of being addressed. WHO's monitoring work emphasises measuring health inequalities across population groups because these measurements can reveal which groups are being left behind and help guide policies intended to improve equity.
In healthcare, health equity can involve both access and quality. Equitable access means that people with comparable health needs can obtain appropriate care and that additional support is available where circumstances create additional barriers. Equitable quality means that the care received is effective, safe, people-centred and responsive to people's needs rather than merely technically available. WHO's description of quality health services includes effectiveness, safety and people-centredness, alongside other quality dimensions.
Equity can therefore be considered throughout the pathway from prevention and health promotion to diagnosis, treatment, rehabilitation and palliative care. A service can be technically excellent yet still contribute to inequity if substantial groups cannot reach it, afford it, understand it or benefit from it.
Health equity is closely connected with universal health coverage and primary healthcare. Universal health coverage seeks to ensure that people can obtain needed health services without financial hardship, while a primary healthcare approach places care closer to people's everyday environments and emphasises comprehensive, continuous, people-centred services. WHO describes primary healthcare as a whole-of-society approach that combines integrated health services, action on wider determinants and empowerment of individuals, families and communities. Primary care can contribute to equity by providing accessible first-contact care, continuity and coordination, but equitable health also requires action beyond clinical services. Strong primary healthcare systems can therefore be an important mechanism for reducing disparities while broader social policies address underlying causes.
In practical terms, improving health equity involves identifying who experiences worse health or poorer access, understanding why the difference exists, designing interventions around those causes, and measuring whether the gap changes. Examples can include improving access in underserved areas, providing interpretation or accessible communication, adapting services for disability, targeting preventive programmes towards populations with greater unmet need, reducing financial barriers, improving transport and digital access, and addressing discrimination.
Equity work is consequently both clinical and organisational as well as social and economic. It requires disaggregated data so that averages do not conceal substantial differences between groups. The central principle is that health opportunities and health services should be organised so that avoidable disadvantage does not determine who can achieve good health.
