How to determine acute vs. chronic hepatitis C? Acute hepatitis C: Clinical manifestations are consistent with acute hepatitis. The incubation period of acute hepatitis C after transfusion ranges from 2 to 16 weeks, with an average of 7.4 weeks. The length of the incubation period is related to the amount of virus input, and is generally shorter for those who have multiple inputs or a large number of inputs at one time. Serum HCV RNA and/or anti-HCV is positive. Chronic hepatitis C: Clinically consistent with chronic hepatitis, except for other types of hepatitis. 85% of patients with acute hepatitis C will be transformed into chronic hepatitis C if not detected in time or if the necessary tests are not performed. ALT can be repeatedly elevated or persistently elevated for more than six months, and anti-HCV and HCVRNA are positive. The number of people with a history of blood transfusion should be checked for anti-HCVHCV-RNA as soon as possible. of course, at present, China has long implemented a compulsory blood donation system, there is a great reduction in hepatitis C caused by blood transfusion and application of blood products, but other causes of hepatitis C, such as drug use, has not been reduced, and there is an increasing trend! Be alert, everyone! Do I need aggressive treatment for acute hepatitis C? What is the most important treatment? Although some patients with acute hepatitis C can recover spontaneously, all patients with acute hepatitis C should be treated aggressively because the acute phase has the best outcome. Treatment can be based on rest, enzyme reduction, liver protection, antiviral and other symptomatic treatments, the most important of which is the antiviral treatment, namely the application of alpha interferon and ribavirin.