Key findings
• Sharing needles/syringes and injecting equipment poses a substantial risk to HCV transmission among PWID.
• While needle/syringe sharing is low among PWID, equipment sharing is far more common.
• Those who have tested positive to HCV antibodies are 7.5 times more likely to receptively share needles/syringes than those who tested negative to HCV antibodies, thereby putting themselves at increased risk.
• Harm minimisation interventions and public health messages need to target this behaviour to reduce the risk of HCV infection.