Wiessing L, Kalamara E, Stone J, Altan P, Van Baelen L, Fotiou A, Garcia D, Goulao J, Guarita B, Hope V, et al. Univariable associations between a history of incarceration and HIV and HCV prevalence among people who inject drugs across 17 countries in Europe 2006 to 2020 - is the precautionary principle applicable?. Euro Surveill [Internet]. 2021;26. Website

Psichogiou M, Karabinis A, Poulakou G, Antoniadou A, Kotanidou A, Degiannis D, Pavlopoulou ID, Chaidaroglou A, Roussos S, Mastrogianni E, et al. Comparative Immunogenicity of BNT162b2 mRNA Vaccine with Natural SARS-CoV-2 Infection. Vaccines (Basel) [Internet]. 2021;9. Website

Chaintoutis SC, Thomou Z, Mouchtaropoulou E, Tsiolas G, Chassalevris T, Stylianaki I, Lagou M, Michailidou S, Moutou E, Koenen JJH, et al. Outbreaks of SARS-CoV-2 in naturally infected mink farms: Impact, transmission dynamics, genetic patterns, and environmental contamination. PLoS Pathog [Internet]. 2021;17:e1009883. Website

Petraki I, Kalpourtzi N, Terzidis A, Gavana M, Vantarakis A, Rachiotis G, Karakosta A, Sypsa V, Touloumi G, Hprolipsis Study G. Living in Roma Settlements in Greece: Self-Perceived Health Status, Chronic Diseases and Associated Social Determinants of Health. Int J Environ Res Public Health [Internet]. 2021;18. Website

Sypsa V, Roussos S, Paraskevis D, Lytras T, Tsiodras S, Hatzakis A. Effects of Social Distancing Measures during the First Epidemic Wave of Severe Acute Respiratory Syndrome Infection, Greece. Emerg Infect Dis [Internet]. 2021;27:452-462. Website

Arum C, Fraser H, Artenie AA, Bivegete S, Trickey A, Alary M, Astemborski J, Iversen J, Lim AG, MacGregor L, et al. Homelessness, unstable housing, and risk of HIV and hepatitis C virus acquisition among people who inject drugs: a systematic review and meta-analysis. Lancet Public Health [Internet]. 2021;6:e309-e323. Website

Bowman B, Psichogyiou M, Papadopoulou M, Sypsa V, Khanna A, Paraskevis D, Chanos S, Friedman SR, Hatzakis A, Schneider J. Sexual Mixing and HIV Transmission Potential Among Greek Men Who have Sex with Men: Results from SOPHOCLES. AIDS Behav [Internet]. 2021;25:1935-1945. Website

Kostaki EG, Limnaios S, Roussos S, Psichogiou M, Nikolopoulos GK, Friedman SR, Antoniadou A, Chini M, Hatzakis A, Sypsa V, et al. Validation of molecular clock inferred HIV infection ages: Evidence for accurate estimation of infection dates. Infect Genet Evol [Internet]. 2021;91:104799. Website

Kostaki EG, Pavlopoulos GA, Verrou KM, Ampatziadis-Michailidis G, Harokopos V, Hatzis P, Moulos P, Siafakas N, Pournaras S, Hadjichristodoulou C, et al. Molecular Epidemiology of SARS-CoV-2 in Greece Reveals Low Rates of Onward Virus Transmission after Lifting of Travel Restrictions Based on Risk Assessment during Summer 2020. mSphere [Internet]. 2021:e0018021. Website

Papatheodoridis G, Sypsa V, Lampertico P. Reply to: "Similar risk of hepatocellular carcinoma during long-term entecavir or tenofovir therapy in Caucasian patients with chronic hepatitis B". J Hepatol [Internet]. 2021;74:246-247. Website

Papatheodoridis GV, Dalekos G, Idilman R, Sypsa V, Van Boemmel F, Buti M, Calleja JL, Goulis J, Manolakopoulos S, Loglio A, et al. Predictive performance of newer Asian hepatocellular carcinoma risk scores in treated Caucasians with chronic hepatitis B. JHEP Rep [Internet]. 2021;3:100290. Website

Sypsa V, Flounzi E, Roussos S, Hatzakis A, Benetou V. Food insecurity among people who inject drugs in Athens, Greece: a study in the context of ARISTOTLE programme. Public Health Nutr [Internet]. 2021;24:813-818. Website

Mylona E, Margellou E, Kranidioti E, Vlachakos V, Sypsa V, Sakka V, Balis E>, Kalomenidis I. Clinical features and outcomes of hospitalized COVID-19 patients in a low burden region. Pathog Glob Health [Internet]. 2021:1-7. Website