Note: average (larger bar) and median are shown Percentage of cases reporting a history of IDU among acute and chronic hepatitis C and acute hepatitis B notifications with known risk factor information, European Union 2002-06 (source EMCDDA 2008 / Wiessing et al. 2008) Wiessing L, Guarita B, Giraudon I, Brummer-Korvenkontio H, Salminen M, Cowan SA. European monitoring of notifications of hepatitis C virus infection in the general population and among injecting drug users (IDUs) – the need to improve quality and comparability. Euro Surveill. 2008;13(21):pii=18884. http://www.eurosurveillance.org/ViewArticle.aspx?ArticleId=18884 European Monitoring Centre for Drugs and Drug Addiction. 2008 Annual report: the state of the drugs problem in Europe. Lisbon: EMCDDA, 2007. http://www.emcdda.europa.eu/publications/annual-report/2008 Note: average (larger bar) and median are shown