The hepatitis C window period is the gap between exposure and when a test can reliably detect infection. An HCV RNA (viral) test can find the virus within a couple of weeks, while the standard antibody test usually turns positive within a few weeks to a couple of months. To be confident after a known exposure, retest at the longer end of that window.
with the right treatment
testing, not symptoms, decides
| Item | Value |
|---|---|
| Curable? | yes — with the right treatment |
| Tested by | exam + lab |
| Often | no symptoms |
| If you may have it | get tested — testing, not symptoms, decides |
What hepatitis C is and how it spreads
Hepatitis C is a liver infection caused by the hepatitis C virus (HCV), and it spreads when blood from an infected person gets into someone else's bloodstream CDC. The first six months after infection is called acute hepatitis C; most people who are infected go on to develop a chronic, lifelong infection if it's not treated. Unlike hepatitis B, hepatitis C can be cured, with treatment clearing the virus in more than 95% of people.
Most people with acute infection feel nothing at all, which is why timing your test matters. If you do develop signs, they tend to be vague: fatigue, nausea, or yellowing of the skin and eyes (jaundice, a sign the liver isn't clearing bilirubin normally). For a fuller picture of what to watch for, see hepatitis c symptoms in men and women.
How hepatitis C is tested
Testing follows a two-step sequence. It starts with an HCV antibody test, usually run on a blood sample, which detects the antibodies your immune system makes in response to the virus. If that antibody test is positive, the lab automatically runs a nucleic acid test (NAT) for HCV RNA, which looks for the virus's genetic material directly and confirms whether you have a current, active infection CDC testing.
A positive antibody result alone doesn't mean you're infected right now. Antibodies can linger after a past infection that cleared or was cured, so the RNA test is what separates a current infection from an old one. For a deeper breakdown of antibody versus RNA testing, see the hepatitis c test guide.
When to test after exposure: the window period
The two tests have different windows because they detect different things. HCV RNA appears in the blood first, detectable within a couple of weeks of exposure, which makes the RNA test the earliest reliable option. Antibodies take longer because your body has to mount a response, and that detection window can stretch from a few weeks out to roughly a couple of months.
For context on timing, the average time from exposure to any symptoms is 2 to 12 weeks, with a full range of 2 to 26 weeks CDC clinical. Don't use symptoms as your testing cue, since most people never get them. Here's how to think about timing:
- For the earliest possible answer after a known exposure, an HCV RNA test can detect the virus within a couple of weeks.
- For the standard antibody screen, wait several weeks; a negative test in the first few weeks doesn't fully rule out a recent exposure.
- If your first test is negative but the exposure was recent, retest at the longer end of the window to be confident.
- A negative antibody test well past the window, with no new exposures since, is reliable.
This timing logic applies to most infections you'd test for after a risk, not just hepatitis C. Our when to test after exposure page walks through the windows side by side.
Who should get screened
Screening recommendations are broad because so many infections are silent. The CDC recommends that all adults 18 and older be screened for hepatitis C at least once in their lifetime, and that all pregnant people be screened during each pregnancy. The U.S. Preventive Services Task Force gives a Grade B recommendation for one-time screening of all adults aged 18 to 79 USPSTF.
Beyond the one-time screen, test sooner and repeat more often if you have ongoing risk: anyone who has ever injected drugs or shared injection equipment, people who received blood products before widespread screening, those on long-term dialysis, and anyone with a known blood exposure. Roughly 2.4 million Americans are living with chronic HCV, and most don't know it, which is why universal screening exists CDC surveillance. Reported acute cases run around 5,000 a year, a number that vastly undercounts true new infections.
Getting tested: what to expect and what it costs
Testing is straightforward. Most of these screens come from a simple blood draw or, with some at-home kits, a finger-stick blood sample you collect yourself and mail in. Results usually come back within a few days. You can get tested at a doctor's office, a community health department, Planned Parenthood, or a Title X clinic, often free or low-cost. At-home options exist too, and you can get tested without a clinic visit if that's easier.
If you want to weigh accuracy, price, and turnaround across services, you can compare testing providers. If you're using an at-home kit, confirm it includes RNA reflex testing. A kit that only reports an antibody result still leaves you needing a confirmatory test if it's positive.
Reading your results
Your result depends on which tests were run:
| Antibody | HCV RNA | What it means |
|---|---|---|
| Negative | Not run | No HCV detected; if exposure was recent, retest after the window closes. |
| Positive | Positive | Current, active infection — you can be treated and cured. |
| Positive | Negative | Past infection that cleared or was cured; no active virus now. |
That last row is why the RNA test exists. A positive antibody with a negative RNA means you've encountered the virus before but don't carry it now. Antibodies stay positive for life, so a past-positive antibody is a reason to confirm with RNA, not to panic.
If your test is positive
A confirmed current infection is highly treatable: direct-acting antiviral pills cure more than 95% of people, usually over a course of 8 to 12 weeks, and the cure is durable AASLD/IDSA. Specialist guidance recommends treating essentially everyone with HCV, not only advanced cases. Take the full course even after you feel well, and don't stop early. For regimens and what treatment involves, see the hepatitis c test resources and your prescribing clinician.
Cure does not give you immunity. Hepatitis C antibodies stay positive for life, so you can be infected again, and only an RNA test can catch it. If you have ongoing risk, plan on annual retesting; more on this in hepatitis c reinfection.
When to see a clinician
See a clinician promptly if you have a known blood exposure and want the earliest reliable test, if any screen comes back positive, or if you develop jaundice, persistent fatigue, abdominal pain, or dark urine. Clinics handle this diagnosis every day.