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Policy-relevant population health research: new approaches and opportunities.

At the national level, recent work has emphasised the need for an evidence-based approach to public policy and has suggested ways to build and utilise an effective evidence base. Leaders of governments in the United States, the United Kingdom (UK) and Australia support the increased use of evidence in policy. The 58th session of the World Health Assembly acknowledged the importance of this issue in passing a resolution requesting the DirectorGeneral of the World Health Organization (WHO) to: