In fact, hepatitis B is not uncommon all over the world. The so-called hepatitis C, which is actually short for hepatitis C, is an infectious hepatitis caused by hepatitis C virus (HCV) infection. According to statistics, more than 200 million people worldwide are currently infected with the hepatitis C virus, accounting for 3.3 percent of the entire population. The infection rate is slightly lower in some regions (e.g., 1.2% in our neighbor Japan) and alarmingly high in others (e.g., 14.5% in Egypt). According to the 1992 National Sero-Epidemiological Survey, the positive rate of hepatitis C antibodies in the Chinese population was about 3.2%, suggesting that the rate of hepatitis C infection in China is at an intermediate level. However, due to the large population base in China, it is conservatively estimated that about 30 million people are infected with hepatitis C virus. Compared with hepatitis B and other types of hepatitis, hepatitis C has four characteristics. 1. Inconspicuous or atypical symptoms and an insidious clinical course. Although HCV causes ongoing liver cell damage, most patients (which can approach 80%) have no symptoms that can be felt, especially within the first 10-20 years of viral infection. The main symptoms of hepatitis C are malaise, vague liver pain, decreased appetite, diarrhea, malignancy, and wasting, with isolated cases of yellow bile and other severe manifestations. It is worth noting that once the obvious manifestations appear, the damage to the liver is usually more serious, and in some cases even to the stage of cirrhosis. 2, transaminases are normal or mildly abnormal more. About half of the patients with hepatitis C have normal blood glutamate transaminase or mildly elevated (less than 2 times the normal value). So if it is not specifically stated during the physical examination to check for hepatitis C, many HCV infected people are not detected. 3, the development of chronic more. Hepatitis is chronic once the course of the disease exceeds 6 months and the virus does not turn negative. The rate of chronicity after HCV infection is 50%-85%, which is significantly higher than that of hepatitis B. 4, cirrhosis and liver cancer occur more often, the prognosis is poor.