Lic. Ernesto Marin Peña

Climate change has emerged as one of the most important public health challenges of the twenty-first century, profoundly influencing the epidemiology of climate-sensitive diseases and increasing the vulnerability of urban populations worldwide. This review aimed to analyze current scientific evidence regarding the relationship between climate change, climate-sensitive diseases, and the resilience of public health systems, with particular emphasis on urban environments and the Latin American context. A narrative literature review was conducted following the Scientific Method, using publications indexed in PubMed/MEDLINE, Scopus, Web of Science, and official reports issued by international organizations, including the World Health Organization, the Pan American Health Organization, the Intergovernmental Panel on Climate Change, the United Nations, and the World Meteorological Organization. The reviewed evidence demonstrated that rising temperatures, changing precipitation patterns, extreme weather events, environmental degradation, and accelerated urbanization contribute to the increasing burden of vector-borne, respiratory, water- and food-borne, and heat-related diseases. Urban environments were identified as particularly vulnerable because of high population density, socioeconomic inequalities, environmental pollution, and limitations in health infrastructure. The review also highlighted that resilient public health systems incorporating epidemiological surveillance, early warning systems, climate-resilient healthcare infrastructure, technological innovation, and multisectoral governance are essential to strengthen adaptation capacity and reduce climate-related health impacts. Overall, the findings support the integration of climate adaptation into routine public health planning and emphasize the importance of international collaboration, sustainable urban development, and evidence-based policies to protect increasingly urbanized populations under future climate scenarios.

Medical education is undergoing a structural transformation driven by the need to align professional training with evolving health system demands. This study analyzes the integration of transformational leadership, academic innovation, and competency-based medical education (CBME) within an international comparative framework involving Mexico, Colombia, and Ecuador. Using a structured analytical approach grounded in leadership theory, CBME frameworks, and global quality standards, the study examines implementation maturity, assessment practices, innovation adoption, and their interrelationships at the institutional level. The results demonstrate differentiated levels of CBME maturity across national contexts and reveal a consistent positive association between transformational leadership profiles and CBME implementation strength. Academic innovation adoption also parallels maturity patterns, suggesting that structured innovation mechanisms contribute to the operationalization of competency frameworks. An interaction analysis indicates that the highest maturity levels occur when leadership capacity and innovation adoption are jointly elevated. These findings support the conceptualization of CBME as a systemic reform requiring coordinated governance, assessment modernization, and leadership development. The integration of transformational leadership and academic innovation emerges as a strategic pathway for strengthening medical education quality and alignment with international accreditation standards.

Health inequities remain one of the most persistent challenges in global public health. This review analyzes international epidemiological evidence on the structural determinants shaping disease distribution, with contextual reference to middle-income countries such as Mexico, Colombia, and Ecuador. Using a structured narrative approach grounded in the social determinants of health framework, the study examines how socioeconomic position, income inequality, structural discrimination, and differential access to preventive services influence measurable health outcomes. The synthesis highlights consistent social gradients in avoidable mortality, preventive service coverage, and cardiometabolic risk factors, demonstrating that inequities are not random variations but patterned reflections of social organization. Evidence further indicates that health disparities can widen during periods of societal crisis, reinforcing the importance of equity-sensitive resilience strategies. The findings underscore that effective public health policy must extend beyond clinical care and incorporate multisectoral action targeting structural determinants. By linking epidemiological measurement with policy translation, this review emphasizes the role of evidence-informed governance in reducing avoidable and unjust health disparities.

Health systems are increasingly challenged to improve quality, efficiency, and sustainability in the context of growing clinical complexity and workforce demands. Organizational strategies and medical education models have been widely recognized as critical determinants of health system performance; however, these domains are often addressed separately in policy and practice. This review synthesizes international evidence on the interaction between health service administration and medical education, focusing on how their alignment influences system-level outcomes. A structured integrative review of the literature was conducted, drawing on foundational and contemporary studies related to governance, workforce management, quality frameworks, competency-based education, assessment systems, and continuous professional development. The results indicate that health systems demonstrating stronger alignment between administrative leadership and educational strategies more frequently report improvements in workforce performance, quality management, and system coherence. Competency-based education and robust assessment mechanisms emerge as central educational approaches, particularly when supported by governance structures and workforce planning strategies. The analysis also highlights uneven integration of safety culture and interprofessional education across organizational and educational domains. Overall, the findings underscore that sustained improvements in health system performance are most likely when administrative and educational strategies are designed and implemented as interconnected components of a unified system.

Adolescent vaccination is a critical component of preventive public health strategies, yet persistent inequities in vaccine coverage continue to affect adolescents in Latin America. This review examines patterns of inequality in adolescent immunization coverage, with a multiregional focus on Mexico, Colombia, and Ecuador. Drawing on peer-reviewed literature, regional policy reports, and international immunization datasets, the study analyzes temporal trends, socioeconomic and geographic disparities, and differences associated with vaccination delivery platforms. The findings indicate that adolescent vaccination coverage shows incomplete recovery over time and remains strongly patterned by social determinants, including socioeconomic position, urban–rural residence, and linkage to school-based delivery systems. School-based vaccination strategies are associated with higher coverage, while facility-based and outreach approaches demonstrate greater vulnerability to access barriers. Structural and organizational factors, such as service availability and missed vaccination opportunities, appear to contribute more substantially to inequities than vaccine hesitancy alone. Overall, the results highlight that improvements in national coverage averages mask persistent disparities affecting disadvantaged adolescent populations. Addressing these inequities requires equity-oriented immunization strategies that integrate delivery platforms, strengthen monitoring systems, and prioritize adolescents in vulnerable social and territorial contexts.