Sustained virological response to PEG-IFN and ribavirin is maintained in 99% of patients during
long-term follow-up. Late virological relapse occurred within 1
year after SVR and, from a clinical perspective, patients can be considered cured of infection after this period.
http://hepatitiscnewdrugs.blogspot.com/2010/03/sustained-virological-responsesvr-to.