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Why Is a Negative AIDS Test Not Always Right?

HIV testing relies on seroconversion, which is the development of a detectable level of antibodies to HIV. Because the amount of time this process takes varies individually, a negative result for an HIV test is not always right.

  1. Average Time Frame

    • Most people who contract HIV develop a detectable level of antibodies to HIV within a month after infection. The presence of HIV antibodies demonstrates that the body has generated an immune response and that HIV infection is present.

    Time Frame Considerations

    • For some people, it may take between three and six months to seroconvert. There is no way for an individual to know how long this process will take.

    Other Time Considerations

    • An HIV test performed before a month's time has passed since exposure is highly unlikely to return an accurate result. Even if a month has passed and you test negative, you should be tested again within the three-to-six-month window to confirm your status.

    RNA Tests

    • RNA tests for HIV can return accurate results within seven to 10 days after exposure, according to HIVplusmag.com. However, these tests are less widely used and may not be easily available.

    Regular Screening

    • The best way to know your status is to be regularly screened for HIV once every six months. HIVTest.org can help you find a testing site in your area (see Resources below).

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