Of the 90 antiretroviral (ART)-naïve women selected from the parent study, the full-length NS5B could be amplified from 85 (94.4%) including 25 with HCV mono-infection, 29 with HIV/HCV co-infection and CD4 cell count <350 cells/mm3, and 31 women with HIV/HCV co-infection and CD4 cell count ≥350 cells/mm3. Here, CD4 is linked to coinfection.