What it measures
- Hepatitis B surface antibody (anti-HBs)
Who it’s for
- Healthcare, dental and care workers needing proof of immunity
- Checking your response to a hepatitis B vaccine course
- Travel or occupational health requirements
Proof of immunity for work
Many healthcare, dental and care roles, and some students, need written proof of hepatitis B immunity. After a full vaccine course, a level of 10 mIU/mL or more is generally taken as a response, and a level of 100 mIU/mL or more as a good response. Occupational health teams set their own requirements, so check what yours needs.
Checking after vaccination
The best time to check is one to four months after your final vaccine dose. If your level is low, you may need a booster or a repeat course, and your result helps your doctor decide.
How to prepare
- Drink a couple of glasses of water beforehand: it makes the sample quicker and easier to take.
- No fasting needed. Eat and drink as normal.
How it works at our Croydon clinic
Book online
Choose your test and a time that suits you. No GP referral needed.
A 15-minute visit
A trained clinician takes a small blood sample at 169 Shirley Road, Croydon. Tell us if you’re nervous.
Results in 1–3 days
A clear report showing each result against its reference range.
Next steps
Share your report with your GP, who can arrange NHS follow-up if anything needs it.
Questions
Will my employer accept the report?
You’ll receive a written report with your result and its units. Most occupational health teams accept it, but check their requirements before booking.
Does a positive result mean I have hepatitis B?
No. Surface antibodies mean protection. To check for a current infection you need our Hepatitis B Test (surface antigen).
How much is a Hepatitis B Immunity in Croydon?
£70 at our clinic at 169 Shirley Road, Croydon, including taking your blood sample and your report.
How quickly will I get my results?
Usually within 1 to 3 days, in a clear report showing each result against its reference range.