Hi Edwin, How are you? My name is Dr Suresh Raghavaiah and I am a Liver transplant surgeon. Thanks for writing to HCM and I hope to answer your question today. I am so sorry that you have to undergo this anguish of a borderline Hbsag result. I understand form your history that the test was done 3years ago. Was any repeat testing done? Were you advised vaccination against hepatitis B? And were you advised any other blood tests? If not then I think the time has come for you to get re-tested. I would start with the HbsAG test itself and if that is negative, that would be the end of it. But if again it turns out to be positive or borderline, then I would advise you to further get tested for HbcAg, Anti HbC ag antibody, and HbeAg. These tests will help put your mind to rest. The most definitive test would be to get a hepatitis B viral DNA level checked, but I would not do it unless I have done all of the other tests. Hope this helps you and hope you get to feel better. Please do not hesitate to write back for clarifications. Have a great day. Dr Suresh Raghavaiah