Hepatitis is a general term that means inflammation of the liver. The Ancient Greek word hepa refers to the liver, and the Latin word itis means inflammation (as in appendicitis, arthritis, and pancreatitis).
Inflammation of the liver—hepatitis—has several possible causes, including:
Toxins and chemicals such as excessive amounts of alcohol
Autoimmune diseases that cause the immune system to attack healthy tissues in the body
Fat which may cause fatty liver disease
Microorganisms, including viruses
Hepatitis C is a curable disease caused by a virus that infects the liver. The virus, called hepatitis C virus (HCV), can cause lifelong infection, fibrosis (mild to moderate liver scarring), cirrhosis (serious liver scarring), liver cancer, liver failure, and death.
There are two phases of hepatitis C infection—acute and chronic. Acute refers to a new HCV infection that is less than six months old. An HCV infection that lasts more than six months is chronic. There are 2.7 million to 3.9 million people in the United States with chronic HCV infection, and more than 21,000 new cases annually. Chronic HCV infection accounts for more than 17,000 deaths each year in the United States.
Worldwide, it's estimated that up to 150 million people are living with HCV.