Hepatitis B vaccine
Informed by recognized medical guidance
Overview
The hepatitis B vaccine is a safe and effective shot that protects against hepatitis B, a serious liver infection caused by the hepatitis B virus. It is given as a series of injections.
Key facts
- The vaccine is usually given as a series of 3 or 4 injections over 6 months.
- It provides long-lasting protection, often for life.
- The vaccine is recommended for all infants at birth, and for adults at higher risk.
The vaccine is very common and is part of routine childhood immunisation schedules in many countries, including the UK.
The vaccine is recommended for everyone, especially newborns, children, healthcare workers, people with chronic liver disease, and those at increased risk of exposure to the virus.
Symptoms
- Confusion or difficulty thinking clearly
- Bleeding that does not stop easily
- Severe abdominal swelling or pain
- ⚠Jaundice that worsens
- ⚠Vomiting blood or passing black, tarry stools
Common symptoms
- Many people with hepatitis B have no symptoms at all.
- Fatigue
- Loss of appetite
- Nausea and vomiting
- Abdominal pain or discomfort
- Dark urine
- Jaundice (yellowing of the skin and eyes)
Symptoms in children
- Children often have no symptoms, but some may have mild flu-like symptoms.
Symptoms in older adults
- Older adults are more likely to develop symptoms and may have more severe illness.
Causes
Main causes
- Infection with the hepatitis B virus
- The virus is spread through contact with infected blood or body fluids
Risk factors
- Unprotected sex with an infected person
- Sharing needles or syringes
- Being born to a mother infected with hepatitis B
- Living or travelling in areas where hepatitis B is common
- Occupational exposure (e.g., healthcare workers)
When to see a doctor
See a doctor urgently if:
- If you have symptoms of acute hepatitis, such as jaundice or severe abdominal pain
Book a routine appointment if:
- To discuss getting the hepatitis B vaccine if you are at increased risk
- For routine blood tests if you think you may have been exposed
Diagnosis
Hepatitis B is diagnosed with a simple blood test that looks for parts of the virus or antibodies your body makes.
Tests that may be done
- Hepatitis B surface antigen (HBsAg) test
- Hepatitis B core antibody test
- Hepatitis B surface antibody test
What to expect at your appointment
Your doctor will take a blood sample and send it to a lab. Results usually come back in a few days. You may need a follow-up appointment to discuss next steps.
Treatment
There is no specific cure for acute hepatitis B. Most adults recover on their own with supportive care. For chronic hepatitis B, antiviral medications can reduce the virus and prevent liver damage.
Self-care at home
- Get plenty of rest
- Drink fluids to stay hydrated
- Avoid alcohol and drugs that can stress the liver
- Eat a balanced diet
Medical treatments
If you have chronic hepatitis B, your doctor may prescribe antiviral medicines to lower the virus levels and protect your liver. Regular monitoring with blood tests and imaging is important.
When is surgery considered?
Surgery is rarely needed for hepatitis B itself, but may be required for complications such as liver cancer or severe cirrhosis.
Living with this condition
Living with chronic hepatitis B means taking your medication as prescribed, attending regular check-ups, and protecting your liver by avoiding alcohol and certain medications.
Lifestyle tips
- Avoid sharing razors, toothbrushes, or needles
- Use condoms to reduce the risk of spreading the virus to others
- Keep up with vaccinations for hepatitis A and other liver-related infections
Diet and exercise
Eat a healthy, balanced diet with plenty of fruits and vegetables. Limit processed foods and sugary drinks. Regular exercise helps maintain a healthy weight and supports liver health.
Mental health and emotional wellbeing
A diagnosis of hepatitis B can be stressful. It is normal to feel anxious or worried. Many people benefit from talking to a counsellor or joining a support group.
Prevention
Yes, hepatitis B is preventable with the hepatitis B vaccine. Other prevention measures include safe sex practices and avoiding needle sharing.
Vaccines
The hepatitis B vaccine is very safe and effective. It is given as a series of injections, usually starting at birth or at any age for those at risk.
Screening programmes
Pregnant women are routinely screened for hepatitis B to prevent transmission to the baby, who can be given the vaccine at birth.
Complications
If left untreated
- Chronic hepatitis B infection
- Cirrhosis (scarring of the liver)
- Liver cancer
- Liver failure
Long-term outlook
With proper vaccination, hepatitis B is preventable. For those who already have the infection, modern treatments can control the virus and reduce the risk of complications. Many people live long, healthy lives with chronic hepatitis B.
Find support
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Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
Related conditions
Sources and guidance
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 20, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.