Hello and welcome to HCM
HBsAg is Hepatitis B virus antigen. It is the first antigen to appear in blood following infection by Hepatitis B Virus. Its appearance is followed by appearance of antibody to HBsAg.
Besides infection, HBsAg is also positive after immunization
with Hepatitis B vaccine
Once a person is positive or weakly positive for HBsAg it needs to be confirmed by confirmatory tests like neutralization test. A weak positive result is an equivocal result. It needs to be confirmed further.
So, now that you are HBsAg positive it has to be confirmed by a more sensitive test like a neutralization test.
If that test is also positive measures should be taken to clear this infection.
a subsequent sample may be tested to confirm the presence or absence of the viral antigen.
Thanks and take care
Dr Shailja P Wahal