Hepatitis B Surface Antibody

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.

Frequently asked questions

What is a normal Hepatitis B Surface Antibody level?

A typical reference range for Hepatitis B Surface Antibody is 10–10000 mIU/mL (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.

What units is Hepatitis B Surface Antibody measured in?

Hepatitis B Surface Antibody is most commonly reported in mIU/mL. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.

Where do Hepatitis B Surface Antibody reference ranges come from?

BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.

Can I track Hepatitis B Surface Antibody over time?

Yes. Upload results from any lab and BloodId charts your Hepatitis B Surface Antibody over time against its reference range, so you can see whether the trend is rising, falling, or stable.

Related biomarkers

• Antistreptolysin O (ASO)
• HIV Ag/Ab Combo
• Helicobacter pylori Stool Antigen
• Hepatitis B Surface Antigen
• Hepatitis C Antibody
• Syphilis Antibody