What sample is required?
The determination is made from a venous blood sample, or sometimes by finger prick.
Is some kind of prior preparation necessary?
For this test you do not need any special preparation.
Why do the analysis?
To determine if there is human immunodeficiency virus (HIV) infection.
When to do the analysis?
At least once between the ages of 13 and 64; when there may have been exposure to the virus; before or during pregnancy; annually if you belong to a population group with a higher risk of contracting the infection.