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Do HIV antibodies persist in the blood once produced?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hello doctor,

Do the HIV antibodies, once formed, persist for life? To be more precise, if once created, can we see HIV antibodies inside blood forever?

And also, no matter how many times the exposure happens, does the blood test pick up the first infection, or does the blood test only go for the recent disease?

Please advise.

Hello,

Welcome to icliniq.com.

I can understand your concern.

HIV (human immunodeficiency virus) antibodies are seen only when the patient has an HIV infection, which is not curable. So, you can say HIV antibodies are lifelong, like HIV. Blood tests detect either the HIV-1 or HIV-2 virus or its antibodies. Since this is a lifelong infection, it is difficult to tell whether the positive test is from the first infection or a subsequent infection.

I hope I have solved your query.

Thank you.

Patient's Query

Thank you, doctor, for the reply.

I understood from you that HIV antibodies are lifelong. My other doubt was that the exposure happened eight years before and has caused the infection, and the second exposure was two months before and may or may not have caused an infection.

If you take the test now, does the test pick up the first infection, which happened eight years before, or the second infection?

Can you please help?

Hello,

Welcome back to icliniq.com.

No, this is not true. The test can not differentiate between the two infections.

I hope I have solved your query.

I will be happy to help you further.

Thank you.

Medically reviewed byiCliniq medical review team

Published At January 5, 2022
Reviewed AtDecember 19, 2025

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