HIV Antibody & P24 Antigen




4-12 Hours




Blood test for early detection of HIV

Blood levels of P24 antigen are high in the first few weeks after infection, meaning the test can detect infection in the earliest stages.


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How does this test work?

The test for HIV antibodies checks for antibodies to the virus in your blood. Antibodies are proteins that the immune system produces when it is trying to fight off an infection; different antibodies are produced to fight different infections.

The HIV infection produces its own proteins, known as antigens, and the body’s antibodies are designed to fit these antigens perfectly – like a key into a lock. The antibodies bind to the antigens in a bid to destroy them, so when you have an infection trying to take hold in the body, you will also have the corresponding antibodies trying to fight it.

Why Get The HIV Antibody & P24 Antigen Test?

The HIV Antibody & P24 Antigen test is crucial for detecting Human Immunodeficiency Virus (HIV), a virus that attacks the immune system and can lead to Acquired Immunodeficiency Syndrome (AIDS) if not treated. HIV is primarily transmitted through unprotected sex, shared needles, and from mother to child during childbirth. The test detects early markers of HIV: p24 antigen, present shortly after infection, and antibodies that the body develops in response. This dual approach enables early detection, vital for prompt treatment and reducing virus transmission. Early treatment can significantly improve quality of life and longevity for those with HIV.

What To Do Next

If you need an HIV Antibody & P24 Antigen test, whether for routine screening or due to potential exposure, we are here to help. Book your appointment online or contact our clinic by phone to arrange your test.

How To Book A Sexual Health Screen Appointment?

book online or call us

Use our online booking engine or book your test by giving us a call.

Choose your test type

On the online booking engine select the “appointment type” you need.

meet with our experts

You will be seen by one of our friendly doctors or trained clinicians.


  • Please arrive well-hydrated.
  • For accuracy, the best window period for this test is 6 weeks after exposure.
  • For early detection tests, 10 days post-exposure.
  • Discuss your options with your nurse.
During the test
  • The P24 test is a simple blood test.
  • A needle is inserted into a vein, usually on the inner arm near the elbow, and a small amount of blood is drawn.
  • You may feel a pricking or scratching sensation.
  • Confidentiality and privacy are at the core of our services.
  • You can decide if you would like to be called or emailed with the results or if you prefer to contact the clinic yourself.

Why Choose Walk In Clinic For
Sexual Health Screening?

since 1998

Experienced doctors & a professional team

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Up-to-date with the latest treatments & testing


Experienced doctors & a professional team

Affordable private
health care

Transparent fee structure with no hidden charges


No hidden charges, phlebotomy fees or prescription charges.
Test prices do not include a consultation.

Instant HIV Test

  • 60 seconds turnover time

HIV Antibody And P24 Antigen

  • Most accurate 6 weeks from exposure
  • 4-12 hours turnover time

HIV-1 RNA, Fast Early Detection

  • Accurate 10 days from exposure
  • 4-12 hours turnover time

see other Sexual Health services

Book Your GP Appointment Today

Fast, affordable, high-quality GP and medical testing services with same-day appointments.

Specialist Medical Team

We work with experienced consultants & healthcare professionals who have received positive feedback from our patients, and with whom we have established long-term relationships.


How accurate are the results?
If the test is taken three months or more after the possible risk of infection, a negative result is accurate. If the test is taken sooner than this, it should be repeated at a later appointment. A positive test should also be repeated in order to confirm the result.
Apart from the issue of peace of mind, early detection can also help to prevent new infections of HIV. Almost half of new cases are thought to be spread by those who have been newly infected and are not aware of it. Those who have been recently infected also have much higher levels of the virus in their systems, which can make transmission more likely.
A negative result could mean that the person tested is: HIV-positive but infected before the early detection window; HIV-positive but with low levels of p24 antigen; HIV-negative.

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