The Hepatitis B titer test, which measures the Hepatitis B surface antibody (anti-HBs) quantitatively, is often a prerequisite for schools and employers. It determines the level of Hepatitis B surface antibodies in the bloodstream, helping ascertain the need for vaccination. After undergoing a vaccination series, this test also verifies whether the individual has developed sufficient immunity against Hepatitis B.

This assay is crucial for determining one's immune status regarding Hepatitis B. It is also known as the Hepatitis B IgG titer test, providing quantitative results.

About Hepatitis B Surface Antibody (HBsAb or anti-HBs):
The Hepatitis B surface antibody, or "surface antibody," is produced by the body in response to the Hepatitis B virus. It can result from vaccination or recovery from a Hepatitis B infection. A positive result indicates that the immune system has successfully generated protective antibodies against the Hepatitis B virus. This provides long-lasting immunity against future Hepatitis B infections. Importantly, individuals who test positive for the surface antibody are not infected and cannot transmit the virus to others.

This quantitative test, required by many educational and medical institutions, provides specific levels of anti-HBs, aiding in assessing immunity status.

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