Interim analysis of a 3-year follow-up study of NS5A and NS3 resistance-associated substitutions after treatment with grazoprevir-containing regimens in participants with chronic HCV infection.

Abstract excerpt

BACKGROUND: In HCV-infected people who fail to achieve sustained virological response after receiving a direct-acting antiviral regimen, virological failure is almost always accompanied by the presence of resistance-associated substitutions (RASs) in the target protein(s). The aim of this long-term observational study was to evaluate the persistence of NS3/4A and NS5A RASs in participants with genotype (GT) 1...

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