When it comes to hepatitis, the first thing that comes to the minds of most Chinese people is probably the “fear and worry” of hepatitis B. However, many medical experts around the world are more concerned about hepatitis C, which is considered an “invisible killer. However, many medical experts around the world are more concerned about hepatitis C, which is considered an “invisible killer”. The scary thing about hepatitis C is its insidious nature. The early clinical symptoms of hepatitis C are not obvious, and most patients are not detected until the disease is advanced, and the absence of a hepatitis C test in routine testing makes it easy to overlook. The chronicity rate of hepatitis C infection is extremely high, reaching 75%-85%; if chronic hepatitis C is not treated promptly and reasonably, 10%-30% can develop into cirrhosis; among patients with cirrhosis, about 3%-10% can evolve into hepatocellular carcinoma. In fact, hepatitis C is more frightening than hepatitis B. Studies have shown that hepatitis C can increase the likelihood of developing diabetes and may increase the risk of some other tumors. People at high risk for hepatitis C include: people with a history of blood donation, especially plasma donation; people who have received blood transfusions (especially before 1993), maintained hemodialysis and received organ transplants; people who have used blood products such as plasma and albumin (especially before 1995); people who use intravenous drugs; people with HIV infection; babies born to mothers infected with the hepatitis C virus; needle sticks, knife wounds or mucosal exposure Hepatitis C virus-positive blood, medical, emergency or security personnel; unsafe sex; patients who have undergone surgery or interventional procedures; and partners of a spouse infected with hepatitis C virus. In addition to the above high-risk groups, tooth extraction, razor sharing, and the popular acts of tattooing, tattooing, earring piercing, and accidentally sticking needles are all high-risk behaviors for hepatitis C infection, and are ways of transmission of hepatitis C. People may unknowingly become infected with hepatitis C in their daily lives. Those who are found to have abnormal liver function during annual physical exams, have no history of blood transfusions, and are negative for hepatitis B should also be tested for hepatitis C antibodies early to rule out hepatitis C infection. The hepatitis C virus is highly variable and has many different routes of infection, and there is no effective vaccine available.