Kieran, age 40, goes to his health maintenance organization (HMO) to see his physician, Dr. Scotty. He is complaining of general fatigue and loss of appetite, and he notices the whites of his eyes...

Kieran, age 40, goes to his health maintenance organization (HMO) to see his physician, Dr. Scotty. He is complaining of general fatigue and loss of appetite, and he notices the whites of his eyes look yellowish. Dr. Scotty orders blood tests for Kieran. The blood tests reveal he has hepatitis C. Explain what hepatitis C is.