Figure 1. Maximum-likelihood phylogenetic tree derived using hepatitis C virus (HCV) NS5B gene sequences of isolates from anti-HCV positive persons identified during HIV outbreak investigation, Unnao, India. Grey circles indicate nodes with >70% bootstrap support. Red indicates samples with HIV–HCV co-infection; blue indicates samples with HCV monoinfection. i, HIV–HCV co-infection; ic, HCV monoinfection.