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Apr 10, 2011

what is CD4%? how it is different from cd4 count? what is the importance of cd45? why cd4 count changes but not cd4%? Thank you.

Response from Dr. Holodniy

CD4% is the percentage of lymphocytes that are CD4+. The CD4 count is the number of these cells. The CD4% will change, but not as quickly or drastically as the CD4 count can. CD45 is another cell surface receptor, like CD4, that is involved with helping to turn immune cells on and off when they are needed. It appears on CD4 cells, as well as other cells in the blood like b cells or monocytes.

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