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Testing

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Testing basics leaflet.

What does ‘reactive’ mean when testing for HIV?

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A close-up of a glass receptacle which contains a testing vial. This vial is labelled as being ready to receive blood for an HIV test. The image has a pink and purple filter over it. The image has a pink and purple filter over it.

What does ‘non-reactive’ mean when testing for HIV?

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A close-up image of somebody holding an HIV test between two of their fingers. The test has not been taken yet and is blank. The person is wearing blue surgical gloves. The image has a pink and purple filter over it.

What does ‘indeterminate’ mean when testing for HIV?

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Mareike Günsche | www.aspect-us.com

What is p24 antigen?

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A close-up of somebody's hand in a blue surgical glove holding a vial of blood hand.

HIV testing

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A close-up of a glass receptacle which contains a testing vial. This vial is labelled as being ready to receive blood for an HIV test. The image has a pink and purple filter over it. The image has a pink and purple filter over it.

Early HIV infection

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A woman site on the sofa with a blanket over her and around her shoulders.

What is the window period for HIV testing?

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A person wearing a surgical glove holds the hand of somebody else. This person is having their finger pricked with a fine needle. The needle has drawn a small amount of blood which is visible. The image has a pink and purple filter over it.

Sensitivity and specificity of HIV tests

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A close-up of somebody's hand. They are wearing blue surgical gloves and holding a vial that contains a small amount of blood. The image has a pink and purple filter over it.

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