Hepatitis C is an infection that mostly affects the liver. The hepatitis C virus (HCV) causes this disease. Often, a person with Hepatitis C does not have any symptoms (health problems or signs that he has the disease). However, chronic infection can scar the liver. Many years of infection may cause cirrhosis. Sometimes, people with cirrhosis also have liver failure or liver cancer. They can also have very swollen veins of the esophagus and stomach. The blood loss from this problem can kill.