Viral hepatitis C, or hepatitis C for short, is a viral hepatitis caused by hepatitis C virus (HCV) infection. After a patient is infected with (HCV), the incubation period is about 15 to 150 days, followed by initial hepatitis symptoms, which, when left untreated for a long time, can lead to chronic inflammatory necrosis and fibrosis of the liver, and within 20 years, most patients will develop liver failure, cirrhosis and hepatocellular carcinoma associated with HCV infection. There are three main routes of transmission of HCV: First, blood transmission, which accounts for the majority of infections, especially through blood transfusions and the use of unsterile needles. Second, sexual transmission, the chances of occurrence are not too great, unlike the occurrence of blood transfusion infection will be 100% infectious. Third, mother-to-child transmission, this route with the improvement of the conditions of delivery, the occurrence of the situation is greatly reduced. Most of the hepatitis C patients in China were infected in the 1960s and 1970s by mistakenly entering blood containing the hepatitis C virus when blood plasma transfusions were not specifically checked for the virus. Technically, there are 6 types of hepatitis C virus, and 50 subtypes under the 6 types, but for us ordinary people, we don’t need to know about so many subtypes, we just need to know the most important ones. The main types of hepatitis C around us are type 1, type 2 and type 3. These three types, have covered the current type attribution for most patients in Europe, North America, Japan and China. Hepatitis C types 4, 5 and 6 are commonly found in smaller parts of the world, so there is no need to say more. The subtypes of hepatitis 1 C can be subdivided into: 1a, 1b, 1c; the subtypes of hepatitis 2 C are: 2a, 2b, 2c, 2i, 2k; and the subtypes of hepatitis 3 C are: 3a, 3b.