Hepatitis C Testing

Section Editor: Rodney E. Rohde PhD
June 2, 2026

Hepatitis C is a viral infection of the liver, caused by the hepatitis C virus (HCV). Hepatitis means inflammation of the liver, the large organ that filters the blood and helps with digestion. Testing for hepatitis C is usually done in two steps: an antibody test first, and then, if needed, an RNA test. Understanding this two-step process matters because a positive antibody test result alone does not mean you have a current infection.

This article explains the two hepatitis C tests, how they fit together, and what the wording on your report means, so you can better understand a report you have received. It is also worth knowing from the start that hepatitis C can now be cured in the great majority of people with a short course of medicine.

What is hepatitis C, and why are two tests used?

The hepatitis C virus spreads mainly through blood-to-blood contact. Many people with hepatitis C have no symptoms for years, so testing is often the only way to find it.

Two tests are used because they answer different questions. The antibody test shows whether you have ever been exposed to the virus. The RNA test shows whether the virus is in your body right now. Both are needed because hepatitis C antibodies stay in the blood for many years, often for life, even after the virus is gone. As a result, the antibody test cannot tell a current infection apart from a past one that has cleared. Only the RNA test can do that.

The antibody test (the first step)

The first test is the hepatitis C antibody test, sometimes written as anti-HCV. Antibodies are proteins that the immune system makes in response to the virus. A reactive (positive) result means you have been exposed to hepatitis C at some point in your life. Two points about this result are important to understand:

It does not mean you have a current infection — Because antibodies remain for years, a positive antibody test can reflect either a current infection or one that has already cleared. An RNA test is needed to tell the difference.
It is not a sign of immunity — Unlike some other antibodies, the hepatitis C antibody does not protect you from the virus, and a person can be infected again after a past infection.

Antibodies also take a few weeks to a few months to develop. For this reason, the antibody test can be negative very early in an infection, during the window period.

The RNA test (the second step)

The RNA test, also called the HCV RNA test or viral load test, directly detects the virus’s genetic material (RNA) in the blood. It answers the question the antibody test cannot: Is the virus present now?

If RNA is detected, the virus is present, indicating a current (active) infection. If RNA is not detected in someone with a positive antibody test, the virus is no longer in the body and the infection has cleared, either on its own or after successful treatment. Many laboratories automatically run the RNA test on the same blood sample whenever the antibody test is reactive, so you may see both results on a single report.

How to read your results together

Reading the two tests together is what gives you the full picture. The combinations below cover the most common patterns.

Antibody negative — No exposure to hepatitis C was found, so a current infection is unlikely. If there was a possible very recent exposure, a repeat test or an RNA test may be advised because of the window period.
Antibody positive, RNA detected — You have a current (active) hepatitis C infection. This is the result that leads to treatment.
Antibody positive, RNA not detected — You were exposed to hepatitis C in the past, but the virus is no longer in your body. The infection cleared, either on its own or after successful treatment. Your antibody test will likely stay positive for life, and because the antibody does not protect you, a new infection is still possible.

Other tests: genotype and confirming a cure

Two further tests may come up if you have a current infection or are being treated.

Genotype — Hepatitis C comes in several types, called genotypes. In the past, knowing the genotype was needed to choose treatment. Newer medicines work against all the common genotypes, so genotype testing is needed less often now, but it is still done in some situations.
Confirming a cure — After treatment, the RNA test is repeated, usually about 12 weeks after the medicine is finished. If the virus is still not detected at that point, the infection is considered cured.

What happens after these tests

Hepatitis C testing shows where you stand with the virus and informs the decisions you and your healthcare team make together, rather than dictating them on its own.

If your antibody test is negative, no further action is usually needed, aside from a repeat test if a recent exposure is a concern or regular testing if there are ongoing reasons to be tested. If your antibody test is positive and the RNA is detected, you have a current infection and would usually be referred for treatment. Hepatitis C is treated with medicines called direct-acting antivirals, usually taken for 8 to 12 weeks, which cure the great majority of people. A provider, sometimes a liver or infectious disease specialist, guides your treatment and monitors your liver. If your antibody test is positive but the RNA is not detected, you do not have a current infection, and depending on your history, your provider may check your liver health and discuss how to avoid a new infection. The main reason finding and treating hepatitis C matters is that, left untreated over many years, it can lead to scarring of the liver (cirrhosis) or liver cancer.

Questions to ask your doctor

Did I have the antibody test, the RNA test, or both?
Based on both results, do I have a current infection or a past infection that has cleared?
If my antibody test is positive but no RNA test was done, do I need one to know whether I have the virus now?
Could it be too soon after a possible exposure for the test to be accurate?
If I have a current infection, what does treatment involve and how long does it take?
After treatment, how and when will a cure be confirmed?
Since the antibody does not protect me, how can I avoid getting hepatitis C again?
Has the infection affected my liver, and does my liver need to be monitored?
Should the people close to me be tested?
Who should I contact with questions about my results or my care?