A project was completed to on determination of the risks of re-infection with hepatitis C and assess the regression of liver fibrosis within the framework of the operational study “Effectiveness of the Programme of treatment of hepatitis C (HCV) for vulnerable groups in terms of the limited resources” under the project “Expanding the access to effective treatment of hepatitis C (HCV) for vulnerable groups in terms of the limited resources”, which was implemented on the order of the ICF “Alliance of Public Health”. During the period from March till June 2018, 506 respondents were interviewed in 18 medical institutions of Ukraine.