You must be tested to find out if you have HIV. If you do have HIV, your body makes substances called HIV antibodies. HIV tests show if your blood has HIV antibodies in it. If it does, you are HIV+.
It takes time for HIV antibodies to build up in your body. You must have been infected with HIV for at least 3 to 6 months before a test can tell if you have HIV. This chart shows 3 kinds of tests for HIV:
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If you are sexually active or use IV drugs, you are at risk for HIV transmission and should get tested for HIV every 6 months. To find an HIV testing center near you, click here.
Next >> How HIV works in the body