after you take vaccine test for hbsab only, not for hbsag
you can take vaccine if you like since hbsag is still negative
the virus can take few weeks to months to start the infection, it is not the test sensibility itself but the virus which needs to reach the liver to start an infection
so the virus can be i your body and never make an infection or it cnnot be there at all...you will know with another test in 6 months.the infection will be cleared by immune system usually with no symptoms, adults not clearing are very rare, only 2.8%
in the meantime you can have hbv vaccine so whatever you ll be covered