Some countries may need to update polices and regulations, or review how they are interpreted, to enable other non-clinical health professionals and trained lay providers to offer HIV testing services. See further WHO guidance on harnessing the full potential of community health workers, including lay providers. In test for triage, a trained provider performs a single rapid diagnostic test and then facilitates linkage to appropriate further testing and services depending on the test result. In the context of HIV, anyone who has an initial reactive test for triage is then promptly linked to further testing for confirmation of HIV status. This strategy is used for self-testing and can also be used to expand testing in communities by lay providers