Policy Brief. Good practice statement: When planning and implementing a response for HIV, viral hepatitis and sexually transmitted diseases (STIs), policy-makers and providers should be aware that counselling behavioural interventions aimed to change behaviours to reduce risks associated with these infections for key populations have not been shown to have an effect on HIV, viral hepatitis and STIs’ incidence nor on risk behaviour such as condom use and needle/syringe sharing. Counselling and information sharing, not aimed at changing behaviours, can be a key component of engagement with key populations and, when provided, it should be in a nonjudgemental manner, alongside other prevention interventions and with involvement of peers