T cells are a type of white blood cell that is central to your immune defense. There are four types which serve different functions: This article will guide you through how CD4 and CD8 cells interact, ...

What Is a CD4 Count? The CD4 test is one of the more familiar testing assays known to people with HIV. The test measures the level of CD4 helper T-cells in the blood—cells that are not only vital to ...

The image below describes the main parts of both workflows on the basis of a colon sample stained with DAPI and for FOXP3, CD25 and CD4.

The decrease in CD4 cells during HIV infection seems to be driven by immune activation, which does not always correlate with viral load. Experienced clinicians are all too familiar with the ...