Finding the right tests…
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Finding the right tests…
Serology
Hepatitis C spreads mainly through contact with infected blood, and your body makes antibodies once it's been exposed. This test checks your blood for those antibodies, to see whether you've ever been infected with hepatitis C at any point in your life. Health authorities recommend every adult get checked at least once, even without symptoms, because most people with hepatitis C feel fine for years while the virus quietly damages the liver. Your doctor may order it sooner if you've had a transfusion before screening began, injected drugs, or shared needles. A reactive result doesn't confirm the virus is still active — that needs a separate follow-up test.
A reactive or non-reactive reading is what this test returns, based on whether HCV antibodies are present in your blood. Antibodies typically take several weeks to build up after exposure — most people test positive within 8 to 11 weeks, so testing too soon after a specific exposure can miss an early infection. Once your body makes these antibodies, they generally stay detectable for life, whether or not the virus itself is still present. A single blood sample from a vein is enough, and no special preparation, such as fasting, is needed beforehand.
Hepatitis C antibodies are proteins your immune system makes after being exposed to the virus, whether or not your body ever cleared the infection on its own. Roughly 1 in 4 people who catch hepatitis C clear it without treatment, but the antibody stays in their blood regardless, which is why this test alone can't say if the virus is still there.
Hepatitis C often causes no symptoms for years while it slowly damages the liver, so many people don't know they're infected until the disease is advanced. Because of this, health authorities recommend that all adults get tested for hepatitis C at least once in their lifetime, in addition to anyone with a specific risk, such as past injection drug use, a blood transfusion before donor screening began, or a needle-stick injury.
A reactive antibody result means you've been exposed to hepatitis C at some point. It doesn't distinguish a current infection from one your body already cleared, so the next step is an HCV RNA test, which looks for the virus itself. If that test is negative, no virus is currently present in your blood, even though the antibody test stays reactive.
It means you've been exposed to hepatitis C at some point in your life. It doesn't say whether the virus is still active in your body, which is why a reactive result is followed by an HCV RNA test.
Yes. Health authorities recommend every adult be tested for hepatitis C at least once in their lifetime, since the infection often causes no symptoms for years while quietly damaging the liver.
No, not on its own. It only shows whether you've ever made antibodies against the virus; a follow-up HCV RNA test is needed to confirm whether the virus is currently present.
This page is general information about the test, not medical advice. Your own report's reference ranges apply — please discuss your results with your doctor.
Antibodies generally take 8 to 11 weeks to become detectable after exposure. If you've had a recent, specific exposure, your doctor may recommend an RNA test instead, since that can detect the virus within 1 to 2 weeks.
Your sample is usually tested next for HCV RNA, which shows whether the virus itself is currently in your blood. A reactive antibody test with no detectable RNA means you were exposed in the past but don't currently have an active infection.
Yes, in some people. Roughly a quarter of people who get hepatitis C clear it without treatment, but the antibody stays in their blood regardless, which is why the antibody test alone can't confirm the virus is gone.
No. No special preparation, including fasting, is needed for this blood test.