No u cannot clear hbsag. Wait for future potential drugs in development.
Hi, sorry to hear about your story. which country abroad where you rejected from?
The fact that you've attained undetectable hbv dna is a good news, though I don't think it is due to the vitamin you took. Currently, it is only the antiviral drugs that help to clear hbv dna to undetectble levels. But sometimes your own immune system can aslo fight off the virus and even clear hbsag, but this is very rare, something like 1% of chronic hbv patients do clear the virus and hbsag without any treatment.
Most chronic hepB patients have to live with the virus, and in particular the hbsag for life, unless we get a revolution in the drug development that helps us fight the virus and clear hbsag.
Stay positive, follow healthy lifestyle and who, knows one day you may clear hbsag and the virus. But I feel sorry that they rejected you grants just because you're hbsag positive; that is really unfair and unimportant.