Beyond Medicine: Understanding the True Scope of Global Health Disparities

This blog is based on the chapter: Saatchi, A. G. (2026). The Role of Technology in Tackling Global Health Challenges. In Addressing Global Health Challenges Through Financial Innovation and Health Technologies. IGI Global Scientific Publishing. Full chapter available here: Read the full chapter. 

Global health is often discussed through the language of hospitals, doctors, medicines, and treatments. But the true scope of global health is much wider. It is shaped not only by clinical care, but by the conditions in which people are born, grow, live, work, and age. It is shaped by income, education, housing, employment, geography, climate, infrastructure, discrimination, and access to essential services.

At its core, global health is about improving health and achieving health equity

for all people worldwide (Koplan et al., 2009). That means looking beyond disease alone and asking a more difficult question: why do some communities live longer, healthier lives, while others face avoidable illness, delayed care and premature mortality? 

More than medicine: the socio-economic reality

Health outcomes are not distributed evenly across the world. Differences in access to healthcare, the quality of services and resulting health outcomes vary significantly between countries and within them. High-income countries often have more advanced medical infrastructure, stronger digital health systems, and greater specialist capacity. By contrast, many low- and middle-income countries continue to face significant resource constraints, including workforce shortages, limited infrastructure and gaps in access to essential services (World Health Organisation, 2023c; World Bank, 2023). 

These differences matter because they affect whether people can access timely diagnosis, treatment, prevention and follow-up care. They also determine whether health systems can respond effectively to shocks such as pandemics, climate-related emergencies, or emerging infectious diseases.

But global health inequalities are not only a story of the difference between rich and poor nations. Some of the most striking disparities exist within countries themselves.

Inequality within nations

The United Kingdom offers a powerful example. Although it is a high-income country with a publicly funded health system, life expectancy still varies dramatically across geography and levels of deprivation. In the chapter, I note that male life expectancy in Glasgow City is 73.6 years, compared with 84.9 years in Kensington and Chelsea, London. For women, the figures are 78.3 years and 86.5 years respectively (Office for National Statistics, 2025; Office for National Statistics, n.d.). 

That is an 11.3-year difference in male life expectancy between two areas in the same country. The gap becomes even more troubling when looking at healthy life expectancy. In England, people living in the most deprived areas experience over 18 fewer years in good health than those in the least deprived areas (The King’s Fund, n.d.).

These differences are not random. They reflect unequal opportunities to live healthy lives. Income, education, employment, housing, social support, access to nutritious food and access to high-quality healthcare all shape health outcomes (Solar & Irwin, 2010; Marmot et al., 2012). Where these determinants are unequally distributed, health becomes unequal.

Emerging threats are making inequalities worse

Global health disparities are also being amplified by emerging and evolving threats. The COVID-19 pandemic exposed vulnerabilities in health systems across the world, including in countries previously considered well prepared. It showed that disease threats do not respect borders, but their impact is not felt equally.

At the same time, chronic diseases are rising rapidly. Non-communicable diseases such as cardiovascular disease, cancer, diabetes and chronic respiratory disease account for a significant proportion of global deaths, with a particularly heavy burden in low- and middle-income countries (World Health Organisation, 2023b). These conditions often require long-term prevention, monitoring and management, yet the resources needed to provide that care are not evenly available.

Climate change adds another layer of complexity. Rising temperatures, extreme weather events, food insecurity, displacement, and changing patterns of infectious disease all affect health. These impacts are often greatest for populations already facing poverty, weak infrastructure, or limited access to healthcare. Climate change is, therefore, not only an environmental crisis but also a health equity crisis.

Antimicrobial resistance, workforce shortages, and digital exclusion further intensify the challenge. Together, these pressures show why global health cannot be addressed through medicine alone. It requires action on systems, infrastructure, policy, technology, financing, and social justice.

Why this matters for technology

Understanding the true scope of global health disparities is essential if we want technology to help rather than harm. Digital tools, artificial intelligence, telemedicine, mobile health, digital records, predictive analytics, and wearable devices all have potential. But they cannot be designed in isolation from the conditions that shape people’s lives.

A telemedicine platform will not improve equity if people lack internet access, digital literacy, private space, language support, or trust in the health system. AI will not improve outcomes fairly if its data does not represent the populations it serves. Digital records will not transform care if systems cannot communicate with each other or if frontline staff are not supported in using them effectively.

Technology can help bridge gaps, but only if we first understand where those gaps come from.

The path forward

The path forward requires a more honest and holistic understanding of global health. We need to recognise that health disparities are driven by systems, not simply by individual choices or clinical needs. We need to design policies and technologies that respond to local realities. And we need to ensure that innovation is guided by equity, cultural relevance, accessibility, and meaningful community participation.

Global health is far more than medicine. It is a measure of how societies distribute opportunity, protection, and care. If technology is to play a meaningful role in tackling global health challenges, it must be used not only to modernise healthcare, but to address the deeper inequalities that shape who gets to live a longer, healthier life.

To explore the full argument, case studies and complete reference list, read Ameneh Ghazal Saatchi’s chapter, The Role of Technology in Tackling Global Health Challenges, published in Addressing Global Health Challenges Through Financial Innovation and Health Technologies by IGI Global Scientific Publishing Read the full chapter.

References

Koplan, J. P., Bond, T. C., Merson, M. H., Reddy, K. S., Rodriguez, M. H., Sewankambo, N. K., & Wasserheit, J. N. (2009). Towards a common definition of global health. The Lancet, 373(9679), 1993–1995.

Marmot, M., Allen, J., Bell, R., Bloomer, E., & Goldblatt, P. (2012). WHO European review of social determinants of health and the health divide. The Lancet, 380(9846), 1011–1029.

Office for National Statistics. (2025). National life tables – Life expectancy in the UK: 2021 to 2023.

Office for National Statistics. (n.d.). Life expectancy for local areas of Great Britain: Between 2001 to 2003 and 2021 to 2023.

Solar, O., & Irwin, A. (2010). A conceptual framework for action on the social determinants of health. World Health Organisation.

The King’s Fund. (n.d.). Health inequalities in a nutshell.

World Bank. (2023). Universal health coverage as a sustainable development goal.

World Health Organisation. (2023b). Noncommunicable diseases.

World Health Organisation. (2023c). World health statistics 2023: Monitoring health for the SDGs.