HIV Antibody Test (Screen and Confirmation) – Serum/Plasma

Why This Test Is Done

HIV antibody testing is typically performed as part of routine screening, especially if you have risk factors for infection (e.g., unprotected sex, shared needles, or living with someone who has HIV). It may also be recommended during pregnancy, before certain medical procedures, or as part of ongoing health monitoring. Some tests are used to screen for HIV first, followed by a confirmation test to ensure accuracy.

How the Test Works

The test uses a blood sample (serum or plasma) to detect HIV antibodies. The screening test looks for general signs of infection, while the confirmation test provides a more precise result. Both rely on immunoassay methods to identify antibodies produced by your immune system in response to HIV proteins.

Sample Collection and Preparation

A small amount of blood is drawn from a vein, usually in your arm. The blood is then processed to separate the serum or plasma for testing. This process is quick and typically done in a clinical setting.

What to Expect Before the Test

No special preparation is needed for this test. You may be asked to fast before drawing blood, but this depends on the clinic’s protocol. Wear comfortable clothing if you prefer, and let your healthcare provider know about any medications or conditions that might affect results.