The Commission on Macroeconomics and Health recommended a significant expansion in funding for health interventions in poor countries. However, there are a range of constraints to expanding access to health services: as well as an absolute lack of resources, access to health interventions is hindered by problems of demand, weak service delivery systems, policies at the health and cross-sectoral levels, and constraints related to governance, corruption and geography. This special issue is devoted to analysis of the nature and intensity of these constraints, and how they can best be overcome. Copyright © 2003 John Wiley & Sons, Ltd.

A key issue in the expansion of access to priority health services is how best to implement scaling up efforts. In this paper, we explore the relative merits of vertical and horizontal delivery modes; review the literature on the impact of vertical programmes on health systems and on experiences of integrating these programmes; and analyse health interventions in terms of their different modes of delivery within the health system infrastructure. We conclude that expanding access to priority health services requires the concerted use of both modes of delivery, according to the capacity of health systems as it changes over time. Copyright © 2003 John Wiley & Sons, Ltd.

This paper reviews the current evidence base regarding efforts to overcome constraints to effective health service delivery in low and middle-income countries. A systematic literature review was chosen as the approach to gather and analyse existing knowledge about how to improve the 'close-to-client' health system. We focused on three levels of constraints: community and household, the health services delivery level itself, and health sector policy and strategic management. In total, 116 studies were reviewed and their main findings presented. The results should be interpreted with caution due to the considerable limitations in the existing evidence base. Copyright © 2003 John Wiley & Sons, Ltd.

Elimination and eradication initiatives are generally delivered through a vertical approach, which can potentially hamper health systems. We propose 3 approaches by which a measles eradication initiative can ensure that health systems are left strengthened when the eradication goal has been accomplished. First, focus should be placed on strengthening routine vaccination, which could generate positive trickle-up effects on other primary health care services. Second, increased integration with multifunctional health services should be emphasized. Third, efforts should be made to change traditional donor behavior that prioritizes vaccination campaigns and uses uncoordinated staff incentives.

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This paper adopts three approaches to classifying countries by level of constraint, in order to inform the choice of strategies for expanding access to health interventions in different contexts. We find substantial heterogeneity across the 84 low-income and (all) sub-Saharan African countries analysed. Poor sub-Saharan African countries are the most highly constrained; Asian countries, in general, less constrained; and the two Asian giants, China and India, consistently fall above the median. Former Soviet Union countries rank low in terms of governance, but high for health systems variables. Only 10 per cent of the total population of the countries included lives in countries with the greatest constraints. The potential applications of the analysis are discussed, as are the limitations of the cross-sectional, macro level approach. Copyright © 2003 John Wiley & Sons, Ltd.

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