HIV is an infection caused by a virus that attacks the body's immune system.
HIV is most commonly passed on through vaginal or anal sex without a condom.
It can also be passed from mother to child at birth. HIV can be transmitted when injecting drug users share needles. In rare cases, HIV can be transmitted through transfusion of infected blood.
HIV infection may cause a flu like illness a few weeks after infection. After this, people with HIV usually remain symptom free for several years.
However, as their immune system becomes weaker they are less able to fight common infections, for example, pneumonia or tuberculosis. As the immune system also plays a role in preventing the development of cancer, people with HIV are more likely to acquire certain cancers.
AIDS is the final stage of HIV infection. This is when the immune system is so weak that it is unable to fight most infections.
Many people in the UK are carrying the infection without knowing it.
It is important to test regularly for HIV infection (at least once a year, or whenever you have a new sexual partner).
The test for HIV is a blood test.
If you are getting a test in clinic, this is usually from a nurse who will take a blood sample with a needle. We also offer Rapid HIV tests, which use a blood finger prick test, and offer instant results (check our Service Finder to look for local clinics offering Rapid HIV tests).
If you're doing one of our postal STI tests, the HIV test is done via a finger prick. You can watch the blood test instruction video and follow this link to see the instruction leaflet that comes in the kit. HIV may take four weeks to show up in a test from the time of infection.
If you are in any doubt about window periods, you should do a test now, and another test at a later date.
There is no cure for HIV, but there are treatments that enable people to live a long and healthy life. Most treatments for HIV involve taking anti-viral medications.
Being on successful treatment and achieving what is called 'an undetectable viral load' also means that people cannot pass on the virus to sexual partners.
If your HIV test comes back as 'reactive', we may need to do a confirmation test first (if you tested via a postal test or a rapid HIV test).
If your test is confirmed positive, we will help support you to access follow-up care, support and treatment, to ensure you live a full and healthy life. We can also offer you support on telling your partners and helping them access HIV testing, PEP and follow up support.