An infection caused by a virus that attacks the liver and leads to inflammation. The virus is spread by contact with contaminated blood; for example, from sharing needles or from unsterile tattoo equipment. Most people have no symptoms. Those who do develop symptoms may have fatigue, nausea, loss of appetite and yellowing of the eyes and skin. Hepatitis C is treated with antiviral medication. In some people, newer medicines can eradicate the virus.