Biomarker

HIV Antibodies

Antibodies to HIV-1 and HIV-2

Antibodies against HIV-1 or HIV-2, detected by antibody tests and by antigen/antibody combination tests.

Overview

EXPLORE BY LEVEL

When someone is infected with HIV, the body makes against it. Tests can find these in blood or oral fluid.

Quick Facts

AT A GLANCE
MeasuresAntibodies the body makes against HIV
CategoryAntibody · HIV serology
Interpretation limitAntibody tests have the longest window period of HIV test types, and a reactive screening result needs follow-up testing to confirm infection.

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Recommended Reading

Trusted references for learning more about HIV Antibodies.

Research Claims

Antibody tests have the longest window period of HIV test types, and a reactive screening result needs follow-up testing to confirm infection.

Because antibodies take time to develop, test type determines the window period. Laboratory algorithms add supplemental and nucleic acid tests to confirm and differentiate infection.