A 5-year study to observe and describe long-term patient management and treatment patterns with associated outcomes of patients who previously enrolled in Protocol AI452009 (i.e., the CCgenos cross sectional phase, ClinicalTrials.gov Identifier: NCT01293279) and had their genotype characterized at diagnosis of HCV infection in a real world clinical practice in China.

A sample of 600 Han ethnic Chinese male or female who are ≥ 18 years old enrolled and completed in the study of AI452-009 (i.e., CCgenos cross sectional phase, ClinicalTrials.gov Identifier: NCT01293279). In the AI452-009 study, all patients had a recent confirmation of anti-HCV-antibody positive and HCV RNA positive but antiviral treatment naive from 28 university affiliated hospital in China. The primary objective of this study (AI452-018, CCgenos follow up phase, ClinicalTrials.gov Identifier: NCT01293279) is to observe and describe long-term patient management and treatment patterns with associated outcomes of patients who previously enrolled in Protocol AI452009 (i.e., the CCgenos cross sectional phase, ClinicalTrials.gov Identifier: NCT01293279) and had their genotype characterized at diagnosis of HCV infection in a real world clinical practice in China.

Inclusion Criteria:

• None. Patients from AI452-009 study who accepted ICF to be follow up

Exclusion Criteria:

• < 18 years old not Han ethnic Not be willing to be followed up to 5 years

600