At a Glance
Why Get Tested?
Most often, this test is done to measure the strength of your immune system if you have been diagnosed with human immunodeficiency virus (HIV) infection; occasionally, it may be used with other conditions (see Common Questions #4).
When to Get Tested?
When you have been diagnosed with HIV, soon after you are first diagnosed to get a baseline assessment of your immune system; 2-8 weeks after starting anti-HIV therapy and then every three to four months as you continue therapy
A blood sample drawn from a vein in your arm
Test Preparation Needed?