I disse kliniske undersøgelser, i hvilke patienter blev behandlet i et år, var det usandsynligt, at patienter, der ikke viste et virologisk respons efter seks måneders behandling (HCV- RNA under laveste detektionsgrænse), fik vedvarende virologisk respons (HCV - RNA under laveste detektionsgrænse seks måneder efter afbrudt behandling).
During those clinical trials in which patients were treated for one year, patients who failed to show a virological response after six months of treatment (HCV-RNA below lower limit of detection) were unlikely to become sustained virological responders (HCV-RNA below lower limit of detection six months after withdrawal of treatment).