Doctor's Assessment Included
Every result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.
HIV test: 4th-generation antibody and p24 antigen blood test
This 4th-generation combination blood test looks for both HIV antibodies and the p24 antigen, which together allow relatively early detection. It can offer clarity and peace of mind after a possible exposure. A positive result is not a diagnosis on its own and would always need confirmatory testing.
What It Measures
This test simultaneously screens for two markers: the HIV p24 antigen, which is a viral protein produced early in infection, and antibodies that the immune system generates in response to HIV. By detecting both, the test covers different stages of the infection timeline.
The p24 antigen is typically detectable before antibodies develop, which means this combination test can identify HIV infection during the acute phase when viral load is high and transmission risk is greatest.
Why It Matters
HIV often causes few or no symptoms in the early phase, so a blood test can be a way to gain clarity that you cannot get from how you feel alone. Detecting a possible infection earlier may help you discuss timely care and next steps with a doctor. Knowing your status can also support informed choices for yourself and others.
When to Test
A 4th-generation test can often detect infection from about 2 to 6 weeks after a possible exposure, and a reliable negative result is generally expected from about 6 weeks (in line with RIVM guidance). Testing too early may miss a recent infection, so timing matters. It can be helpful to discuss the right moment to test, and whether a repeat test is wise, with a doctor or the GGD.
Recommendations
Male
Non-reactive result indicates no HIV infection detected. Continue safe practices and regular testing if at risk.
Reactive result requires immediate confirmation testing and consultation with an infectious disease specialist.
Female
Non-reactive result indicates no HIV infection detected. Continue safe practices and regular testing if at risk.
Reactive result requires immediate confirmation testing and consultation with an infectious disease specialist.
Lifestyle Tips
Consistent condom use is one of the most effective ways to reduce HIV transmission risk. If you are at higher risk, discuss pre-exposure prophylaxis (PrEP) with your healthcare provider as an additional prevention strategy.
Regular HIV testing normalises screening as part of routine health care. Knowing your status empowers you to make informed decisions about your health and the health of your partners. Never share needles or other injection equipment.