Hepatitis B Antigen (HBsAg) Blood Test
This blood test checks for the presence of the hepatitis B antigen, a protein of the virus. A positive result for the antigens means you are currently infected with hepatitis B and are infectious. Hepatitis B can cause serious liver damage, and is transmitted through unprotected sex, sharing needles or from any situation where you come into contact with bodily fluids from an infected person. Mothers can also pass it to their babies.
Common reasons for this blood test are:
- You’ve been into contact with an infected person, and want to check whether you’ve contracted hepatitis B
- You’ve recently travelled to a country where hepatitis B is common and want to check for infection
- To check your sexual health status to ensure you do not transmit the infection to anyone else.
Your blood test
Our phlebotomy-trained professionals will take a blood sample from you. This sample will be analysed in the UK by our authorised partners, TDL. By booking this blood test, you agree for us to share your personal information with TDL in order to process your test. We’ll make sure you consent to this at your appointment too.
Frequently Asked Questions
No, we will send you the results and recommend that you share these with your GP or fertility provider.
It is not unusual for some bleeding to occur under the skin following your blood test and sometimes this can extend a little further around the puncture site. If this causes you concern, check with your practice nurse.
Sometimes we cannot get a blood sample from you. This can be for many reasons, such as not being hydrated enough, feeling cold or having another blood test recently. We will always offer you another appointment so we can try again.