<prompt> Commonest risk factor for HCV infection is:i.v. drug abuseMultiple sex panersSurgery within last 6 monthsMultiple contacts with HCV infected person  <response>: Most common risk factors for HCV infection are: Intravenous drug abuse 54 Multiple sex paners 36 Having had surgery within the last 6 month 16 Needle stick injury 10 Multiple contacts with an HCV-infected person 10 Employment in medical or dental fields 1.5 