What Is Hepatitis B Surface Antigen?

What Is Hepatitis B Surface Antigen?

Hepatitis B Surface Antigen (HBsAg) is one of the standard blood tests used to measure hepatitis B virus.

When the test result is “positive” or “reactive“, it means the person is currently infected with hepatitis B and is able to pass the infection on to others through blood and other body fluid.

Then, the person need further testing to know whether it is a new “acute” infection or a “chronic” hepatitis B infection.


Keywords: Hepatitis B Surface Antigen; hepatitis B virus; positive or reactive; infection

* The Content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.