Most people who receive hepatitis C medications now can be cured. The goal of treatment is to achieve a "sustained viral response" (SVR), meaning that the virus is undetectable six months after treatment is completed. People who achieve an SVR have a 97-100% chance of being virus-free long-term, so they can be considered "cured." With newer drug regimens, cure rates exceed 90% in many groups. The cure rate is slightly lower in people who have failed treatment previously.
However, people who have been cured of hepatitis C may have a higher risk of liver problems later on, especially if they didn't receive treatment until they developed liver cirrhosis. And it is possible to become infected again.