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"With the combination of VX-950, pegylated interferon and ribavirin, we observed unprecedented antiviral activity, with all 12 genotype 1 patients reaching viral levels below the limits of detection at the end of dosing at 28 days," said Eric Lawitz, M.D., of Alamo Medical Research in San Antonio, the investigator presenting the study results. "In addition, no serious adverse events were reported, and those adverse events that were reported are similar to those observed in previous studies of pegylated interferon and ribavirin. These results are highly encouraging for the initiation of future VX-950 studies that seek to evaluate the potential for viral eradication with short duration therapy."