I recently had a blood test done, and I tested reactive for "Antibody to Hepatitis B Surface Antigen". The laboratory note said the following:
"A reactive result indicates that the patient has antibody to Hepatitis B
surface antigen and implies immunity. It does not differentiate between
resolved infection or vaccination. The clinical significance of this result
must be determined in conjunction with clinical signs and symptoms of the
What does this mean? Does it mean I am immune to Hepatitis B? I have received the 3 doses of Hep. B. vaccine in 1999. How long does the antibody last?
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