4th Generation Test Window Period

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Ask the Experts


Dear Doctor,I really want to ask that if the person really have to be tested at 3 months mark then what is the sanctity of 4th Generation Tests claiming to be exponentially reducing the window period?Then even today also one is relying on 3rd...
Robert J. Frascino, M.D.

Response from Robert J. Frascino, M.D.

The Robert James Frascino AIDS Foundation
...I have no doubt that improvements in HIV testing are increasing the accuracy of diagnostic testing and shortening the windowperiod. However, I base my responses on published scientific guidelines, not on "claims." For instance, I have no way of... Read more »

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U.S. Food and Drug Administration

Fourth Generation HIV Diagnostic Test Approved, Permitting Earlier Detection of Infection

...(recent) infection with HIV, prior to the emergence of antibodies produced by the infected patient, effectively reducing the windowperiod (that period after initial infection and before the detection of infection based on formation of detectable... Read more »
AIDS InfoNet

HIV Testing

...with HIV, it usually takes from three weeks to two months for your immune system to produce HIV antibodies. During this "windowperiod" you can test negative for HIV even if you are infected. If you think you were exposed to HIV, you should wait... Read more »
San Francisco AIDS Foundation

HIV Testing

... ELISA Western Blot (WB) Assay Indirect Immunofluorescence Assay (IFA) WindowPeriod Interpretation of Test Results Accuracy of Antibody Tests Anonymous HIV Testing ... Read more »
AIDS InfoNet

Viral Load Tests

...million copies, and are always being improved to be more sensitive. The first bDNA test measured down to 10,000 copies. The second generation could detect as few as 500 copies. Now there are ultra sensitive tests for research that can detect less... Read more »