The purpose of publishing evaluation reports produced by the WHO Evaluation Office is to fulfil a corporate commitment to transparency through the publication of all completed evaluations. The reports are designed to stimulate a free exchange of ideas among those interested in the topic and to assure those supporting the work of WHO that it rigorously examines its strategies, results and overall effectiveness.

The analysis and recommendations of this report are those of the independent evaluation team and do not necessarily reflect the views of the World Health Organization. This is an independent publication by the WHO Evaluation Office. The text has not been edited to official publication standards and WHO accepts no responsibility for error. The designations in this publication do not imply any opinion on the legal status of any country or territory, or of its authorities, or the delimitation of frontiers.