Announcement 26 September 2026: Set 1 of the Q&A is now available under "Documents" tab. The purpose of this Request for Proposals is to identify a suitable contractor to conducting a review of literature on the approaches, effectiveness, and enablers for collecting and using data on private providers to improve health system governance. See detailed Terms of Reference and bidding instructions under “Documents” below.  Please note: it is NOT necessary to click on “Express Interest” on the top right-hand side of the screen. In order to inform WHO that you are interested in participating in this Request for Proposals, please follow the provisions of the RFP document below.