If the EIA test is positive then the Western Blot Test is performed

Western blotting is a technique to detect specific proteins from a sample such as cell or tissue lysates. Western blot is a membrane (nitrocellulose or PVDF) on which the proteins are transferred for further analysis. Proteins on the blot are visualized by specific antibodies.

The western blot test

There are several different ways to confirm HIV infection. One of the most common confirmatory testing methods is by Western Blot. There is also a confirmatory test called ELISA.

There is only one test that can give the accurate results for HIV. The only test that can do this would be the Elisa test.