Global prevalence and genotypes of hepatitis C. Prevalence data are derived from Shepard et al. (2005)  and Te et al. (2010) . Genotype data are from Shepard et al. (2005)  and Te et al. (2010) . The pie chart diameter is Ln (number infected with hepatitis C virus) in the most populous areas of the world. The location of pie charts is approximate, based on the limited studies (reviewed in [27, 28]). Colors in the pie charts represent HCV genotypes: 1, blue; 2, red; 3, green; 4, purple; 5, light blue; 6, orange. Approximately 30 million sub-Saharan Africans have chronic hepatitis C, with widely variant genotypes around the continent.