Frequently asked question: What does it mean if an HIV test is 'indeterminate' or inconclusive?
Sometimes a test is inconclusive. For example, if the result is not clearly positive or negative. Or if the result of the first HIV test was inconclusive or positive but that of the second HIV test was not.
A test is indeterminate if the result of a HIV test is not clearly positive or negative. This can occur in the case of infection with HIV-2 or if the antibodies against HIV are not yet detectable in your blood (for example with partial seroconversion in the case of an acute HIV infection). The transition of non-detectable to detectable antibodies against HIV in your blood is called seroconversion. It is also possible that the result of a first HIV test was indeterminate or positive but that of the confirmatory second HIV test was not. If you do not have an HIV infection, you can get such a result because the test has reacted to antibodies of an auto-immune disorder, a flu vaccination or an HIV-1-vaccine from the past.