Silver Book Fact
Pathogens cause around two million cancer cases worldwide each year. Ninety percent of these cases are attributable to Helicobacter pylori (H Pylori), hepatitis B virus (HBV), hepatitis C virus (HCV), and human papilloma virus (HPV).
De Martel C, Ferlay J, Granceschi S, Vignat J, et al. Global Burden of Cancers Attributable to Infections in 2008: A review and synthetic analysis. Lancet Oncol. 2012; 13: 607-15. http://www.thelancet.com/journals/lanonc/article/PIIS1470-2045%2812%2970137-7/abstract