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	Health Impact Assessment (HIA)
	Evidence \| Examples \| Toolkits \| Other resources


	WHO > Programmes and projects > Health Impact Assessment (HIA)

Health Impact Assessment

HIA provides decision-makers with information about how any policy, programme or project may affect the health of people. HIA seeks to influence decision-makers to improve the proposal. WHO supports the use of HIA because of its ability to influence policies, programmes and/or projects. This provides a foundation for improved health and well-being of people likely to be affected by such proposals.

In this web site, we provide information:

About HIA

- Why use HIA
- Short guides
- Definitions of HIA
- Evidence that HIA works
- Glossary of terms used
- Frequently Asked Questions (FAQs)

On tools and methods to do HIA

- The HIA procedure
- Toolkits, guides, overviews and helpful documents
- Evaluating your HIA

On examples of HIA covering different topics, with a form for you to submit your work to this site.

We investigate how HIA contributes to policy making:

- How to make HIA work with policy making and decision making
- The role of HIA in decision making
- Barriers cited to using HIA in Government policy making

We describe the evidence used in HIA

- The determinants of health
- Evidence base for many topics that can be used in HIA

We also provide links to other websites and describe our work in HIA:

- HIA related sites
- WHO Regional Offices
- WHO HQ - work in HIA
- WHO collaborating centres on HIA
- The reference group for this web site
- HIA capacity building