Plain-language explanation.
Global health focuses on achieving equity in health for all people worldwide — particularly addressing health challenges that transcend national borders and affect populations in low- and middle-income countries (LMICs). It combines medicine, epidemiology, economics, policy, and social science.
Core concepts and standard treatment.
Core global health covers the global burden of disease (GBD study — DALYs, YLLs, YLDs; leading causes of premature death by region — WHO Global Health Observatory), the epidemiological transition (shift from communicable to non-communicable disease in LMICs — NCD burden), major infectious diseases (HIV/AIDS — UNAIDS 95-95-95 targets; malaria — artemisinin-based combination therapy, insecticide-treated bed nets — RTS,S vaccine; TB — MDR-TB, BCG vaccine, DOTS strategy; neglected tropical diseases — NTDs), maternal and child health (MMR, U5MR — SDG 3; skilled birth attendance; IMCI — integrated management of childhood illness), and global health architecture (WHO, GFATM, GAVI, bilateral donors — USAID, FCDO; public-private partnerships).
Deeper theory, debates and edge cases.
Advanced global health covers Universal Health Coverage (UHC — Alma-Ata Declaration 1978; Sustainable Development Goal 3.8; service coverage index; financial risk protection — catastrophic health expenditure; community health insurance — NHIF Kenya, NHIS Ghana), health systems strengthening (WHO building blocks framework — governance, financing, workforce, medicines, information, service delivery; health system archetypes — Beveridge, Bismarck, National Health Insurance, out-of-pocket), global health diplomacy and governance (TRIPS agreement and access to medicines; pandemic treaty negotiations — post-COVID IHR amendments; One Health governance — OHHLEP), decolonising global health (north-south power imbalances in research and aid; LMIC leadership — Lancet Commission; Astana Declaration on primary care), and climate change and health in LMICs (heat stress, vector range expansion, food insecurity, climate migration).
How it is applied in practice.
At the global health specialist and international development adviser level, practitioners contribute to Lancet Global Health and BMJ Global Health; lead WHO and Médecins Sans Frontières field programmes; advise FCDO, USAID, and Gates Foundation on health system investments; design PEPFAR and GFATM grant proposals; lead LMIC health system research (LSHTM, KEMRI, Makerere); apply health economics to assess cost-effectiveness of interventions in LMICs (CHOICE — WHO-CHOICE); and contribute to global health security preparedness (GHSA, JEE assessments — IHR core capacities).