Hepatitis A vs B vs C: Key Differences Explained
Content last reviewed 2026-09-12 · Educational information — not medical advice
Quick answer
Hepatitis A, B, and C are three different viruses that all attack the liver. A spreads through food and water and never becomes chronic; B spreads through blood and sex and has a vaccine; C spreads through blood and is curable. A blood panel can test for all three.
What's the difference between hepatitis A, B, and C?
Hepatitis A, B, and C are three unrelated viruses that all target the liver, but they differ in how they spread, whether they become chronic, and how they're treated. The table below summarizes the key contrasts at a glance.
| Hep A | Hep B | Hep C | |
|---|---|---|---|
| How it spreads | Fecal-oral (food, water, close contact) | Blood, sex, birth | Blood (needles, pre-1992 transfusions) |
| Chronic form? | No | Yes — 90% of infants, 2-6% of adults | Yes — 75-85% of adults |
| Vaccine? | Yes | Yes | No |
| Curable? | Clears on its own | Managed, not cured | Yes — ~95% with DAAs |
| Key test | IgM anti-HAV | HBsAg, anti-HBs | Antibody + RNA |
Which hepatitis is the most serious?
It depends on what you mean by serious. Hepatitis B and C are the ones that can become chronic and cause long-term liver damage, cirrhosis, and liver cancer over years. Hepatitis A is usually acute and self-limiting — unpleasant but rarely dangerous, except in people with pre-existing liver disease. In terms of lifelong impact, B and C carry the heavier burden, though hepatitis C is now curable and hepatitis B is highly manageable with treatment.
Which hepatitis has a vaccine?
Hepatitis A and hepatitis B both have safe, effective vaccines, and they're recommended for all children plus at-risk adults. There is no vaccine for hepatitis C — the virus mutates too quickly. If you're unsure of your immunity, a hepatitis A/B/C immunity panel can check your antibody status for all three at once. Knowing your immunity helps you decide whether vaccination or a booster makes sense.
Which hepatitis is curable?
Hepatitis C is the curable one — about 95% of people are cured with an 8-12 week course of oral antivirals (DAAs). Hepatitis A clears on its own in nearly everyone because it never becomes chronic. Hepatitis B is the outlier: acute infection clears in most adults, but chronic hepatitis B is managed with antivirals rather than cured. Each virus has a different treatment story, which is why knowing which one you have matters.
Can one test check for all three?
Yes. A hepatitis A/B/C panel screens for all three viruses in a single blood draw, covering the surface antigen and antibodies for hepatitis B, antibodies for hepatitis A, and antibodies for hepatitis C. It's a practical way to establish your status and immunity in one visit, especially before travel or when starting a new relationship. A single draw answers the whole hepatitis question instead of leaving gaps.
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Frequently asked questions
Which hepatitis is the most common?
Hepatitis A causes the most acute cases, while hepatitis B and C are the most common chronic infections worldwide, affecting millions of people.
Can you have more than one hepatitis at once?
Yes — co-infection is possible, such as hepatitis B and C together, and it can complicate treatment. A panel test helps clarify your status.