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Frequently Asked Questions

What is the difference between an antibody and an antibody/antigen test?

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Answer

Antibody tests detect the body’s immune response to HIV and may take 4 to 12 weeks to show a positive result. Antibody/antigen (4th generation) tests detect both HIV antibodies and the p24 antigen, meaning they can detect HIV as early as 18 to 45 days after exposure.

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