Publications by Year: 2019

2019
Sypsa V. Why do HIV outbreaks re-emerge among people who inject drugs?. Lancet HIV. 2019;6:e274-e275.
Popping S, Bade D, Boucher C, van der Valk M, El-Sayed M, Sigurour O, Sypsa V, Morgan T, Gamkrelidze A, Mukabatsinda C, et al. The global campaign to eliminate HBV and HCV infection: International Viral Hepatitis Elimination Meeting and core indicators for development towards the 2030 elimination goals. J Virus Erad. 2019;5:60-66.Abstract
Hepatitis B virus (HBV) and hepatitis C virus (HCV) affect more than 320 million people worldwide, which is more than HIV, tuberculosis (TB) and malaria combined. Elimination of HBV and HCV will, therefore, produce substantial public health and economic benefits and, most importantly, the prevention of 1.2 million deaths per year. In 2016, member states of the World Health Assembly unanimously adopted a resolution declaring that viral hepatitis should be eliminated by 2030. Currently, few countries have elimination programmes in place and even though the tools to achieve elimination are available, the right resources, commitments and allocations are lacking. During the fifth International Viral Hepatitis Elimination Meeting (IVHEM), 7-8 December 2018, Amsterdam, the Netherlands, an expert panel of clinicians, virologists and public health specialists discussed the current status of viral hepatitis elimination programmes across multiple countries, challenges in achieving elimination and the core indicators for monitoring progress, approaches that have failed and successful elimination plans.
Papatheodoridis GV, Goulis J, Sypsa V, Lionis C, Manolakopoulos S, Elefsiniotis I, Anagnostou O, Tsoulas C, Hatzakis A, Dalekos G. Aiming towards hepatitis C virus elimination in Greece. Ann Gastroenterol. 2019;32:321-329.Abstract
There are estimated to be 74,000-134,000 patients living with chronic hepatitis C in Greece, but only 20-30% of them are aware of their disease status. In July 2017, the Hellenic National Plan for Hepatitis C was announced in alignment with the World Health Organization goals for the eradication of hepatitis C virus (HCV) by the year 2030. This article discusses the epidemiology and current treatment of chronic hepatitis C in Greece. Additionally the authors propose actions on how to bring back to care diagnosed patients lost to follow up, optimize access to care for HCV-infected people who inject drugs, and increase HCV screening in the general population. The medical community in Greece can play a pivotal role in the implementation of the HCV National Plan and in the efforts to reach the goal of HCV elimination.
Gountas I, Sypsa V, Papatheodoridis G, Souliotis K, Athanasakis K, Razavi H, Hatzakis A. Economic evaluation of the hepatitis C elimination strategy in Greece in the era of affordable direct-acting antivirals. World J Gastroenterol. 2019;25:1327-1340.Abstract
BACKGROUND: Hepatitis C virus (HCV) is a leading cause of worldwide liver-related morbidity and mortality. The World Health Organization released an integrated strategy targeting HCV-elimination by 2030. This study aims to estimate the required interventions to achieve elimination using updated information for direct-acting antiviral (DAA) treatment coverage, to compute the total costs (including indirect/societal costs) of the strategy and to identify whether the elimination strategy is cost-effective/cost-saving in Greece. AIM: To estimate the required interventions and subsequent costs to achieve HCV elimination in Greece. METHODS: A previously validated mathematical model was adapted to the Greek HCV-infected population to compare the outcomes of DAA treatment without the additional implementation of awareness or screening campaigns versus an HCV elimination strategy, which includes a sufficient number of treated patients. We estimated the total costs (direct and indirect costs), the disability-adjusted life years and the incremental cost-effectiveness ratio using two different price scenarios. RESULTS: Without the implementation of awareness or screening campaigns, approximately 20000 patients would be diagnosed and treated with DAAs by 2030. This strategy would result in a 19.6% increase in HCV-related mortality in 2030 compared to 2015. To achieve the elimination goal, 90000 patients need to be treated by 2030. Under the elimination scenario, viremic cases would decrease by 78.8% in 2030 compared to 2015. The cumulative direct costs to eliminate the disease would range from 2.1-2.3 billion euros (euro) by 2030, while the indirect costs would be euro1.1 billion. The total elimination cost in Greece would range from euro3.2-3.4 billion by 2030. The cost per averted disability-adjusted life year is estimated between euro10100 and euro13380, indicating that the elimination strategy is very cost-effective. Furthermore, HCV elimination strategy would save euro560-895 million by 2035. CONCLUSION: Without large screening programs, elimination of HCV cannot be achieved. The HCV elimination strategy is feasible and cost-saving despite the uncertainty of the future cost of DAAs in Greece.
Gountas I, Sypsa V, Papatheodoridis G, Paraskevis D, Kalamitsis G, Anagnostou O, Antaraki A, Fotiou A, Hatzakis A. A hepatitis C outbreak preceded the HIV outbreak among persons who inject drugs in Athens, Greece: Insights from a mathematical modelling study. J Viral Hepat. 2019;26:1311-1317.Abstract
People who inject drugs (PWID) comprise one of the major transmission risk groups for human immunodeficiency virus (HIV) and hepatitis C virus (HCV). In 2011, Athens experienced a large HIV outbreak among PWID. Significant public health interventions were implemented in response to the HIV outbreak. The aims of this study were to estimate the indirect effects of the HIV interventions on HCV infection and to evaluate the concept of the association between HCV and HIV infections in the case of Athens. A dynamic, stochastic, individual-based model was developed to simulate HCV transmission among PWID. We calibrated the model to reproduce the observed HCV prevalence among PWID in Greece. Two years prior to the HIV outbreak, an undetected HCV outbreak has occurred. In 2009, the incidence of HCV infection increased from 640 (495, 842) cases in 2008 to 1260 (1060, 1500). The mean time from initiation of injecting drug use to HCV acquisition decreased from 29 months in 2008 to 13 months in 2009. After HIV interventions, HCV incidence declined by 64.8% in 2012, compared to 2009. The averted HCV incidence cases attributed to the HIV-implemented interventions were 2200 (1950, 2480), during 2012-2015. The cumulative number incident HCV cases in Athens during 2002-2015 was about 9900 (7800, 12 100). Our results highlight that before the 2011 HIV outbreak in Athens, an HCV outbreak occurred in 2009. Prevention measures for HIV that took place in the Athens metropolitan area in 2012 reduced significantly the incidence of HCV.