The Hepatitis B Surface Antibody (anti-HBs) test measures antibodies produced in response to the hepatitis B virus surface antigen. It indicates immunity to hepatitis B from vaccination or past infec…
Category: Infectious Disease
Also known as: anti-hbs, hepatitis b surface antibody, hbsab, hep b surface antibody, hbs antibody, anti hbs
Reference range: 10–10000 mIU/mL (Source: ABIM)
Standard unit: mIU/mL
High values may indicate
High anti-HBs levels indicate strong immunity to hepatitis B, either from successful vaccination or recovery from a past infection.
Low values may indicate
Low or undetectable anti-HBs levels indicate a lack of immunity to hepatitis B, meaning vaccination or a booster dose may be needed.