Hepatitis C is a contagious liver disease caused by infection with the hepatitis C virus. Although hepatitis C is well known in Europe, America and Japan, it is significantly less well known in China than hepatitis A and hepatitis B. Many people, including patients, are not sufficiently aware of hepatitis C, and even have some misconceptions that delay treatment. Generally speaking, patients with hepatitis B do not need antiviral therapy if their liver function is normal. This is because antiviral therapy is not effective in this case. But hepatitis C is not the same as hepatitis B. According to the latest research in the international medical community, even if hepatitis C patients have normal transaminase levels, they may still develop cirrhosis and liver cancer. Meanwhile, studies have shown that the antiviral efficacy of patients with normal hepatitis C function is the same as that of patients with abnormal liver function. Therefore, regardless of whether the patient has symptoms or not, and regardless of whether the aminotransferase is normal or not, as long as the hepatitis C antibody and hepatitis C RNA are positive, antiviral treatment should be given as soon as possible and should not be delayed. As more than 90% of acute hepatitis B will be cured, antiviral treatment is not advocated. However, the chronicity rate of acute hepatitis C is very high, about 75%-80% of acute hepatitis C will turn into chronic hepatitis C. Therefore, acute hepatitis C should be actively treated with antiviral therapy. Therefore, acute hepatitis C should be treated aggressively with antiviral therapy for about 12-24 weeks. Interferon is the drug of choice for the treatment of hepatitis C. However, clinical practice has confirmed that the efficacy of this drug alone is significantly inferior to that of the combination, so now pegylated interferon combined with ribavirin has become the standard protocol for antiviral treatment of hepatitis C. It can effectively clear the hepatitis C virus, and about 70% of patients can be cured. However, interferon has many side effects, which can cause flu-like symptoms, hematocrit, psychiatric abnormalities, autoimmune diseases, and kidney damage. In the course of antiviral therapy should pay close attention to drug toxic side effects. Interferon should be reduced or discontinued if serious adverse reactions occur.