Yes, the anti‑HBs test is commonly called the Hepatitis B titer test, as it measures antibody levels in the blood.

A positive result indicates immunity against Hepatitis B, either from successful vaccination or recovery from past infection.

A negative result means you are not immune to Hepatitis B and may need vaccination or further medical evaluation.

No, it only checks immunity. Active infection is diagnosed using the HBsAg test, not the anti‑HBs test.

Healthcare workers, people at risk of exposure, and those who completed Hepatitis B vaccination should get tested to confirm immunity.

It is usually done 1–2 months after completing the Hepatitis B vaccine series to confirm protective antibody levels.

Yes, antibody levels may decline, but immune memory often persists. A booster may be recommended if levels drop significantly.