Adaptive Public Health in a Changing World: Addressing Emerging Risks and Inequalities in Population Health Systems

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Abstract
Population health is undergoing a significant transition characterized by the interaction of emerging risks, structural inequalities, and evolving public health responses. This review analyzes recent evidence (2020 onward) to explore how contemporary health systems are adapting to complex and interconnected challenges, including pandemics, climate change, globalization, and the dual burden of communicable and non-communicable diseases. A structured narrative review with a systematic approach was conducted, integrating high-impact studies to identify key patterns and determinants influencing population health outcomes. The findings reveal that health inequalities remain a central driver of vulnerability, while governance capacity, environmental pressures, and technological advancements play critical roles in shaping system responsiveness. Adaptive public health models—defined by flexibility, data-driven decision-making, intersectoral coordination, and community engagement—emerge as essential frameworks for improving resilience and equity. Evidence from Mexico, Colombia, and Ecuador highlights the importance of context-specific strategies within shared regional challenges. Overall, the study emphasizes the need for integrated, adaptive, and system-oriented approaches to effectively address the complexity of modern population health and to strengthen public health systems in a rapidly changing global environment.