National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention (U.S.), Division of HIV/AIDS Prevention.

When a person is not infected with HIV but receives a positive test result, that result is considered a false positive. Generally, HIV tests have high specificity, meaning that there are few false-positive results and most uninfected individuals are classified as uninfected by the test. If 1,000 uninfected people are tested with an HIV test and 4 have false-positive results, the HIV test’s specificity is 99.6% (996 true negative test results/1,000 HIV uninfected persons tested). cdc-hiv-factsheet-false-positive-test-results.pdf

Pamphlet (or booklet)

Stephen B. Thacker CDC Library collection