Sotiris Roussos holds a BSc in Mathematics and he is currently an MSc student in Biostatistics at the National and Kapodistrian University of Athens, Greece. His research interest include infectious diseases in people who inject drugs and methods to estimate the size of hard-to-reach populations.

Andrew is Principal Scientist in the Sexual Health and Blood-Borne Virus Team at Health Protection Scotland and Senior Research Fellow within the School of Health & Life Sciences at Glasgow Caledonian University. In 2018, Andrew was awarded the annual Fred Yates prize by the Society for the Study of Addiction.

Dr Scheibe is a researcher and technical advisor who has been working in harm reduction research and service delivery with people who inject drugs in South Africa since 2013. He is involved in using research done with PWID to advance policy and service delivery in South Africa and the region.

Tetiana Saliuk, sociologist/epidemiologyst, Master of Public Health, with 18 years of practical experience in substance abuse and HIV/AIDS/TB/HCV projects. During last years, Tetiana has been working as a researcher and expert in monitoring and evaluation of HIV/AIDS and tuberculosis programs. Tetiana is an author and co-author of 12 scientific publications.

Consultant Physician in Internal Medicine since 2007. He received his PhD in 2014, after his studies on liver fibrosis in HIV/HCV-coinfected patients. He currently works at the HIV and Hepatitis C clinic, Infanta Leonor Hospital, Madrid (Spain). His main clinical areas of expertise are HIV medicine, viral hepatitis and PWID.

Emmanuel Fortier is a MD/PhD student at Université de Montréal (Canada). His research activities are conducted at the CHUM Research Centre (Montréal, Canada) and focus on epidemiology, biostatistics and public health regarding PWID. He is supervised by Prof. Julie Bruneau (CHUM) and co-supervised by Dr. Jason Grebely (The Kirby Institute).

Dr. Meghan Morris is an infectious disease epidemiologist with whose research focuses on social determinants of infectious disease transmissions. Her professional activities engage diverse partners to develop evidence-based solutions to improve health for underserved communities. She is an Assistant Professor of Epidemiology at the University of California, San Francisco.

Dr. Kimberly Page, Ph.D., MPH is an infectious disease epidemiologist and leads nationally and internationally recognized research on HIV and viral hepatitis prevention in underserved and vulnerable populations, including people who inject drugs. She is a Professor of Epidemiology, Biostatistics and Preventive Medicine at the University of New Mexico.