There's no cure for chronic hepatitis B yet, but there's effective control. Antiviral pills like tenofovir or entecavir suppress the virus and protect the liver, though most people take them for life, and clearance happens in only a small share. Acute hepatitis B in adults usually clears on its own CDC.
treatable, not curable
testing, not symptoms, decides
| Item | Value |
|---|---|
| Curable? | managed — treatable, not curable |
| Tested by | exam + lab |
| Often | no symptoms |
| If you may have it | get tested — testing, not symptoms, decides |
Hepatitis B vs. hepatitis C: why one is cured and the other is controlled
Hepatitis C now has a cure: a short course of direct-acting antivirals clears it from most people for good. Hepatitis B is different. HBV slips a stable form of its DNA (called cccDNA) into the nucleus of liver cells, where current drugs can't reach it. So even when antivirals push the virus down to undetectable levels in the blood, the blueprint to restart it stays parked inside your cells. We talk about suppression and control rather than eradication.
Researchers use the term functional cure for the realistic goal: losing the surface antigen (HBsAg) and keeping the virus quiet without ongoing medication. That isn't the same as wiping HBV out of the body, and it happens in only about 2–5% of treated people even after a decade of therapy AASLD, 2018. Be skeptical of anything online promising a fast or natural hepatitis B cure. None exists.
The essentials: acute vs. chronic, and why age matters
Hepatitis B is a vaccine-preventable liver infection caused by HBV, spread mainly through blood and sexual contact. An acute infection is the short-term illness in the first six months after exposure; a chronic infection is one that lasts beyond six months and can be lifelong.
The single biggest factor in whether HBV becomes chronic is your age when you catch it. Infected as an adult, fewer than 5% develop chronic infection, because most people's immune systems clear it. Infected as an infant, about 90% develop lifelong hepatitis B. That's why the birth-dose vaccine matters so much, and why infants and young children are the most vulnerable.
Acute case reports have held roughly steady at about 2,200 a year from 2020 through 2023 CDC surveillance, but that undercounts the picture. Hundreds of thousands more Americans live with chronic HBV they don't know about, since it so often causes no symptoms.
Symptoms of hepatitis B
Many people have no symptoms at all, which is why screening matters. When acute symptoms do show up, they can include:
- Fatigue and fever.
- Poor appetite, nausea, and abdominal pain.
- Dark urine and clay-colored stools.
- Joint pain.
- Jaundice, a yellowing of the skin and the whites of the eyes that signals the liver is inflamed and struggling to process bilirubin.
Most people with chronic HBV feel completely fine for years. The virus can quietly inflame and scar the liver over decades, raising the risk of cirrhosis (extensive scarring that stops the liver working) and liver cancer long before any symptom appears. One more reason a one-time blood test is worth doing.
Testing: the three-part blood panel
Hepatitis B is diagnosed from a blood draw using a triple serologic panel that reads like a status report CDC testing:
- HBsAg (surface antigen) — positive means active infection right now.
- Anti-HBs (surface antibody) — positive means immunity, either from vaccination or from clearing a past infection.
- Total anti-HBc (core antibody) — marks past or current infection.
As of the 2023 update, the CDC recommends screening all adults aged 18 and older at least once in their lifetime, and screening pregnant people during each pregnancy CDC, 2023. Results usually come back in a few days, and testing is free or low-cost at health departments, Planned Parenthood, and Title X clinics. If you're sorting out timing after a possible exposure, see when to test after exposure, and you can get tested without an established diagnosis. Curious how the virus spreads on surfaces? See how long does hepatitis live outside the body?.
Treatment: control, not cure
Acute hepatitis B in adults usually needs only supportive care: rest, fluids, and monitoring while your immune system clears the virus. Chronic HBV is where the drugs come in. FDA-approved antivirals, most often tenofovir or entecavir, suppress the virus and cut the risk of liver cancer and cirrhosis CDC STI Tx.
What treatment is actually like
For most people on chronic-HBV therapy, it's a single daily pill that's well tolerated. Duration is the harder part. Most people take it for life, because stopping usually lets the virus rebound. This is managed by a liver specialist (a hepatologist) or an infectious-disease doctor, with periodic blood work to watch viral levels and liver function. Don't stop the medicine on your own once you feel well; with HBV that can trigger a dangerous flare.
| Acute hepatitis B | Chronic hepatitis B | |
|---|---|---|
| Definition | Illness in the first 6 months | Infection lasting beyond 6 months |
| Typical treatment | Supportive care only | Long-term antiviral suppression |
| Goal | Let the immune system clear it | Suppress virus, protect the liver |
| Cure? | Most adults clear it on their own | No cure; functional cure in ~2–5% |
Prevention: the vaccine does the heavy lifting
Vaccination is the best prevention, and the hepatitis B vaccine has an excellent track record. ACIP recommends it for all adults aged 19–59, and for adults 60 and older who have risk factors CDC, 2022. If you're due for shots, here's the rundown on hepatitis vaccines, plus a focused guide to hepatitis a & b vaccines for gay & bisexual men.
For day-to-day protection, condoms used every time lower the risk of sexual transmission, and routine testing catches the infections that hide without symptoms. After a known exposure to an HBsAg-positive source, post-exposure prophylaxis is hepatitis B immune globulin (HBIG) plus the vaccine, started as soon as possible, ideally within 24 hours.
Preventing mother-to-baby transmission
HBV can pass from a pregnant person to the baby around the time of birth, the most common way young children get infected, which is why every pregnancy is screened with an HBsAg test CDC perinatal. The prevention is highly effective: every newborn gets the hepatitis B vaccine, and a baby born to an HBsAg-positive parent also gets HBIG, both within 12 hours of birth.
Giving the newborn both the vaccine and HBIG drops transmission to about 3.6%, versus 11.6% with vaccine alone, and adding an antiviral for mothers with a high viral load lowers it further to under 2% perinatal meta-analysis. An infant infected at birth has about a 90% chance of lifelong infection, so this prevention is doing enormous work.
When to see a clinician
Get tested at least once even with no symptoms, since universal screening exists because chronic HBV is usually silent. See a clinician promptly if you develop jaundice, persistent abdominal pain, dark urine, or sustained fatigue, or if you've had a possible exposure to blood or to a partner with hepatitis B. If you're pregnant or planning to be, make sure HBsAg screening is on the list. Clinics handle this diagnosis every day, and it says nothing about you as a person.