WHO is the directing and coordinating authority for health within the United Nations system. It is responsible for providing leadership on global health matters, shaping the health research agenda, setting norms and standards, articulating evidence-based policy options, providing technical support to countries and monitoring and assessing health trends.
In the 21st century, health is a shared responsibility, involving equitable access to essential care and collective defence against transnational threats.

The role of WHO in public health
WHO fulfils its objectives through its core functions:
- providing leadership on matters critical to health and engaging in partnerships where joint action is needed;
- shaping the research agenda and stimulating the generation, translation and dissemination of valuable knowledge;
- setting norms and standards and promoting and monitoring their implementation;
- articulating ethical and evidence-based policy options;
- providing technical support, catalysing change, and building sustainable institutional capacity; and
- monitoring the health situation and assessing health trends.
These core functions are set out in the 11th General Programme of Work, which provides the framework for organization-wide programme of work, budget, resources and results. Entitled "Engaging for health", it covers the 10-year period from 2006 to 2015.

World Health Organization
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