To determine the relapse rate at 24 weeks follow up in Hepatitis C Virus Genotype 1 Low Viral Load (HCV LVL G1) patients treated for 24 weeks with Peg Intron and Rebetol who are Hepatitis C Virus-Ribonucleic Acid (HCV-RNA) negative at treatment week 4 and week 24. To determine the proportion of patients (%) with sustained virological response at 24 weeks post follow up treatment.

Approximately 500 patients from about 100 sites to be identified as HCV LVL G1 patients

Inclusion Criteria:

• Willingness to participate
• 18 years or older, either gender, any race
• Must have Hepatitic C Virus Low Viral Load [LCV LVL] (positive, but <600,000 IU/mL on the assay used by the individual study site. Only Hepatitis C Virus-Ribonucleic acid/quantitative polymerase chain reaction [HCV-RNA/qPCR] assays with results in IU/ml are acceptable) AND been diagnosed with Genotype 1
• Subject considered suitable for treatment per local label
• Investigator considers suitable and subject consents to be treated

Exclusion Criteria:

• Does not show negative polymerase chain reaction [PCR] at week 4
• Pregnant women or those who plan to become pregnant or sexual partners of women who plan to become pregnant
• Subject does not qualify based on contra-indication, special warning, special population, and/or pregnancy & lactation section of the Summary of Product Characteristics [SmPC]

primary care clinic

Number analyzed is the number of treated participants (482 of the 496 screened).