The tests commonly used to detect HIV infection are actually looking for antibodies produced by an individual’s immune system when they are exposed to HIV. Most people will develop detectable antibodies within two to eight weeks (the average is 25 days). Ninety seven percent will develop antibodies in the first three months following the time of their infection. In very rare cases, it can take up to six months to develop antibodies to HIV.

For information on where to find an HIV testing site, visit the National HIV Testing Resources Web site at http://www.hivtest.org.

If you would like more information or have personal concerns, call the CDC National AIDS Hotline at 1-800-342-AIDS (2437) (English), 1-800-344-SIDA (7432) (Spanish), or 1-800-243-7889 (TTY).

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