What Are Hepatitis B Antibodies?

Hepatitis B surface antibody is the corresponding antibody produced by the body's stimulation by HBsAg. It can be combined with HBsAg to clear the virus under the action of other immune systems in the body to protect the body from HBV infection. Therefore, anti-HBs are neutralizing antibodies with specific protective functions. The presence of anti-HBs indicates that the body has developed immunity. When anti-HBs can be detected in serum, HBsAg has been negative from serum for about 2 weeks.

Basic Information

Also known as
Anti-HBs
English name
anti-HBs
Visiting department
Infectious Diseases
Common locations
liver
In general, anti-HBs are serological markers of disease recovery and good prognosis. Anti-HBs can be detected in at least 80% of patients with acute hepatitis B after HBsAg has turned negative.

Normal reference value of hepatitis B surface antibody

Enzyme labeling method
Negative or P / N <2.1.
2. Quantitative determination by chemiluminescence
> 10IU / L.

Clinical significance of hepatitis B surface antibodies

1. Anti-HBs positive proves that there is a history of hepatitis B virus infection in the past, and the body has developed a certain degree of immunity.
2. Hepatitis B vaccine injection or anti-HBs immunoglobulin, anti-HBs can be positive.
3. Anti-HBs are protective antibodies. Only when the antibody titer in blood is 1:64 or P / N> 10 or more, the body has protective and neutralizing effects.

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