Migration as a Structural Determinant of Health Systems Performance

International migration reached approximately 281 million people worldwide in 2024, while forced displacement exceeded 114 million individuals — the highest level recorded in modern history 1,2. Although migration is frequently framed as a humanitarian or demographic phenomenon, it increasingly functions as a structural determinant of health systems performance. Mobility exposes institutional fragility across governance architecture, entitlement frameworks, financing models, workforce distribution and digital interoperability. Operational data from international agencies illustrate the systemic scale of migration- related health activity, including millions of consultations in crisis settings, extensive vaccination campaigns and cross-border health interventions 3. This paper advances a structural analytical framework in which migration operates as a continuous systems-level stress test, revealing embedded design contradictions within territorially organized health systems. Drawing on international governance, financing and operational evidence, the analysis reframes migration from episodic emergency response toward institutional transformation aligned with universal health coverage (UHC), resilience and global health governance. Recognizing migration as a structural determinant is essential for designing adaptable, equitable and performance-stable health systems in an era of sustained demographic mobility. Keywords Migration; Health systems performance; Structural determinants; Universal health coverage; Health governance; Resilience; Digital health interoperability