Viral hepatitis C, referred to as hepatitis C, hepatitis C, is a viral hepatitis caused by hepatitis C virus (HCV) infection, and its main transmission routes are as follows: 1. Sexual contact transmission: hepatitis C can be transmitted in up to 20% to 50% of male homosexuals and 12% to 21% of heterosexuals. Therefore, sexual abuse is a risk factor for the transmission of hepatitis C. 2, transfusion of blood products and derivatives: the UK reported 371 cases of clinical hepatitis C occurred in 72 cases (19.4%) after importation of factor VIII from the United States. Foreign also reported the occurrence of hepatitis C due to the transfusion of factor IX or fibrinogen. 3, single plasma collection and transfusion of blood cells: domestic and foreign have reported three outbreaks of hepatitis C caused by cross-contamination during single plasma collection and transfusion of blood cells. 4, drug addicts: often repeatedly use unsterilized or incompletely sterilized syringes to inject drugs for themselves. 5, mother-to-child transmission: mainly occurs in the second trimester of pregnancy. 6, other ways of transmission: with surgery, tooth extraction, autologous blood oxygenation treatment, tattoo, eyebrow tattoo eyeliner, cosmetic, or through the skin, mucosal ulcers and hidden wounds can be transmitted hepatitis C.