Reflex HCV RNA viral load testing. We recommend reflex HCV RNA testing in those with a positive HCV antibody test result as an additional key strategy to promote linkage to care and treatment. This can be achieved either through laboratory-based reflex HCV RNA testing following a positive HCV antibody test using a specimen already held in the laboratory, or clinic-based reflex testing in a health facility through immediate specimen collection following a positive HCV antibody RDT