https://en.wikipedia.org/wiki/Hepatitis_C
Virology
The hepatitis C virus (HCV) is a small, enveloped, single-stranded, positive-sense RNA virus.[5] It is a member of the genus Hepacivirus in the family Flaviviridae.[19] There are seven major genotypes of HCV, which are known as genotypes one to seven.[49] The genotypes are divided into several subtypes with the number of subtypes depending on the genotype. In the United States, about 70% of cases are caused by genotype 1, 20% by genotype 2 and about 1% by each of the other genotypes.[15] Genotype 1 is also the most common in South America and Europe.[5]