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Early signs of HIV, how the different HIV tests work, how long after exposure you should test, and what happens if the result is positive.
By Editorial Team · Updated · 2 min read
This article is awaiting review by a qualified medical professional.
Quick answer
The only way to know your HIV status is to test. Early symptoms 2 to 4 weeks after infection can feel like the flu, but many people have no symptoms at all. Most tests detect HIV within 1 to 3 months of exposure, and if you may have been exposed in the last 72 hours you should seek PEP immediately.
HIV often causes no symptoms at first, so you cannot tell whether you have it by how you feel. Testing is simple, confidential and the only reliable way to know.
Some people develop a flu-like illness 2 to 4 weeks after infection, which can last a few days to weeks. It may include:
These symptoms are common to many illnesses, and many people with HIV have no early symptoms at all.
Without treatment, HIV gradually weakens the immune system over years, leading to frequent infections, weight loss, fevers and other serious illnesses. Advanced HIV is called AIDS. With treatment, most people never reach this stage.
The window period is the time between exposure and when a test can reliably detect HIV. Approximate detection times:
| Test type | Approximate detection time after exposure |
|---|---|
| Nucleic acid test (NAT), blood | 10 to 33 days |
| Antigen and antibody test, laboratory blood test | 18 to 45 days |
| Rapid antigen and antibody test, finger prick | 18 to 90 days |
| Antibody tests, including home self-tests | 23 to 90 days |
If you test during the window period and the result is negative, repeat the test later, as your clinician advises, to be sure.
People at ongoing higher risk may need testing every 3 to 6 months. Ask a clinician what is right for you.
You can be tested at sexual health clinics, family doctors, community health services and many pharmacies. Home self-test kits are available in many countries, and any positive result should be confirmed by a clinic.
A positive result is not a life sentence. With treatment:
Start treatment as soon as possible, and consider telling partners so that they can be tested. Support services and counselling are available.
Get tested if you think you might have been exposed or you have symptoms. If the possible exposure was in the last 72 hours, go to an emergency department or sexual health clinic immediately and ask about post-exposure prophylaxis (PEP).
It depends on the test. The earliest laboratory tests can detect HIV about 10 to 33 days after exposure, and most tests reliably detect it within 1 to 3 months. A clinician can advise on when to test and whether to repeat it.
Yes. Many people have no symptoms for years, which is why testing is the only way to know. Everyone should be tested for HIV at least once.
Yes. Modern HIV treatment (antiretroviral therapy) reduces the virus to undetectable levels, allows people to live a near-normal lifespan, and prevents sexual transmission to partners.
This article is for educational purposes only and does not replace advice from a doctor or other qualified health professional. See our medical disclaimer.
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