What the Hepatitis B Immunity blood test measures

The Hepatitis B Immunity blood test measures Hepatitis B surface antibodies, which are antibodies produced by the immune system in response to the Hepatitis B surface antigen. The presence of these antibodies indicates that the body has developed protective immunity against Hepatitis B virus.

This immunity may be the result of:

• Successful Hepatitis B vaccination, or
• Recovery from a past Hepatitis B infection

This test does not detect the Hepatitis B virus itself and does not diagnose active infection. Its sole purpose is to confirm whether protective immunity is present.

Why testing for Hepatitis B immunity is important

Knowing your Hepatitis B immunity status is essential if you are at risk of exposure, require proof of immunity, or want reassurance following vaccination. Many people assume they are protected after vaccination, but antibody levels can vary and may decline over time.

This test is widely used in healthcare, occupational screening, travel medicine, and routine health assessments. It provides a clear answer as to whether your immune system can effectively protect you from Hepatitis B infection.

Testing may be recommended if you:

• Have completed a Hepatitis B vaccination course
• Need confirmation of vaccine response
• Work in healthcare or a clinical environment
• Are exposed to blood or bodily fluids
• Are planning travel to higher-risk regions
• Are undergoing occupational, visa, or insurance screening
• Want reassurance about long-term immunity
• Are unsure of your vaccination or immunity status

Benefits of the Hepatitis B Immunity blood test

• Confirms protective immunity against Hepatitis B
  Indicates whether you are protected from infection.
• Validates vaccine effectiveness
  Confirms whether vaccination has produced immunity.
• Identifies need for booster vaccination
  Low antibody levels may suggest reduced protection.
• Essential for occupational and clinical screening
  Commonly required for healthcare and laboratory work.
• Supports travel and visa requirements
  Provides documented proof of immunity.
• Simple and reliable blood test
  No preparation or fasting required.
• Clear and easy-to-interpret results
  Provides a definitive immune status.
• Offers reassurance and peace of mind
  Confirms whether further action is needed.

How the Hepatitis B Immunity test is carried out

We offer two convenient UK-wide testing options:

Clinic-based blood testing

• Choose your nearest UK clinic
• A healthcare professional collects a blood sample
• The sample is analysed in a certified laboratory
• Results are issued once testing is complete

Home or hotel blood collection (+£60)

• A qualified phlebotomist visits your location
• Blood is collected at a time convenient for you
• No clinic visit required
• Available nationwide across the UK

Both options provide the same laboratory accuracy and clinical reliability.

Understanding your Hepatitis B Immunity test results

Low or undetectable antibody levels

Low or absent Hepatitis B surface antibodies indicate no protective immunity against Hepatitis B. This may occur if vaccination was never completed, immunity has waned, or the immune response was insufficient.

Typical UK reference range:

• Not immune: < 10 mIU/mL

Vaccination or booster doses may be recommended.

Adequate protective antibody levels

Adequate levels of Hepatitis B surface antibodies indicate protective immunity against Hepatitis B virus.

Typical UK reference range:

• Immune: ≥ 10 mIU/mL

No further action is usually required.

Very high antibody levels

Very high antibody levels indicate strong immune protection, often seen after recent vaccination or past infection with full recovery.

Typical UK interpretation:

• Strong immunity present

This confirms effective long-term protection.