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Hepatitis C Virus Antibody (HCV-Ab)

Published: July 27, 2026Updated: August 25, 2026

The HCV-Ab biomarker measures the presence of antibodies against the Hepatitis C virus in the blood, indicating past or current infection.

Quick summary

HCV-Ab screening detects antibodies to Hepatitis C virus.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 25, 2026Editorial policy

Key facts at a glance

Units
S/CO
Clinical utility
screening
Result kind
quantitative
FDA-cleared
Roche Anti-HCV, Abbott Anti-HCV, Siemens Anti-HCV, Ortho HCV
interpretation: {"text":"No detectable HCV antibodies, suggesting no current or past infection.","label":"Negative (0–1 S/CO)"}; {"text":"Presence of HCV antibodies, indicating exposure to the virus; further testing is required to confirm active infection.","label":"Positive (>1 S/CO)"}

The HCV-Ab test is primarily used as a screening tool to identify individuals who have been exposed to the Hepatitis C virus (HCV). A positive result indicates the presence of HCV antibodies, which the body produces in response to HCV infection.

This test is crucial for early detection and management of HCV infection, as it can lead to chronic liver disease if left untreated. Early intervention can prevent severe liver complications.

The HCV-Ab test is often followed by confirmatory tests, such as HCV RNA testing, to determine if the infection is current and to guide further clinical management.

Frequently asked questions

What does a positive HCV-Ab test mean?
A positive result indicates the presence of HCV antibodies, suggesting exposure to the virus. However, it does not confirm an active infection, and further testing is needed.
Is HCV-Ab testing the same as HCV RNA testing?
No, HCV-Ab testing detects antibodies to the virus, while HCV RNA testing detects the actual virus in the blood, indicating an active infection.
  1. 1
    CDC - Hepatitis C TestingSource
  2. 2
    WHO - Hepatitis CSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy