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Your viral load test shows how much HIV there is in a small sample of your blood. With effective HIV treatment, your viral load will start to decrease over time. When your viral load is below 200 copies/ml, you may get viral load test results back, saying ‘undetectable’. This means the amount of virus in your sample was too little to be measured by the tests.

Depending on where you live and the test used, your results may be reported as “<200”, “<50”, “target not detected”, “ND”, “zero”, “below the undetectable limit” or “negative”. All of these terms mean your viral load is undetectable.

Undetectable viral load does not mean you are cured, or you can stop taking your HIV medication. There is still HIV in your body, but there is very little virus in your bloodstream and body fluids.

Undetectable viral load shows that HIV treatment is working. People who have an undetectable viral load are unlikely to get ill due to HIV, have better long-term health and longer life expectancy than those who don’t. Click here for more information on viral load and HIV treatment.

Studies show undetectable viral load means zero risk of HIV transmission between sexual partners. With very little to no HIV in body fluids, people with HIV who have sustained an undetectable viral load for at least six months cannot pass HIV to their partners, even with no condom use. Click here for more on Undetectable = Untransmittable.

Having an undetectable viral load also reduces the risk of passing HIV on during and after pregnancy. Continuing your HIV treatment and sustaining an undetectable viral load drastically reduces the amount of HIV in the breast milk, but may not remove it entirely. Click here for more information on pregnancy and breastfeeding.

Oğuzhan Nuh

Oğuzhan Nuh

Article author

Oğuzhan (Ozla) is a queer HIV activist and health services researcher from Turkey. As an openly gay man living with HIV, he works with and supports people from marginalised communities and those living with or affected by HIV. He holds an MSc in Health Sciences from the University of Luzern in Switzerland. Ozla is also a Youth Ambassador and an Advocacy for Cure fellow for the International AIDS Society. Instagram

Basic information

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Illustration of HIV virus.

Very recent infection

Very recent infection

Myths and facts

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What is p24 antigen?

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CD4 and viral load

CD4 and viral load

Undetectable viral load

Undetectable viral load

What is the normal CD4 count for an HIV-negative person?

What is the normal CD4 count for someone taking HIV treatment?

Health checks for people with HIV

Health checks for people with HIV

Will I test negative if my viral load is undetectable?

What is a viral load blip, and does it matter?

CD4 cell counts

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CD4/CD8 ratio

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Viral load

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What are logs in viral load results?

Vial of blood ready for viral load testing

Blood tests before starting or changing HIV treatment

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Blood monitoring for people with HIV

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