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For people with HIV, CD4 count and viral load are important indicators of health status. Learn what they measure and how they affect HIV treatment plans.
CD4 cell counts are used to monitor the immunologic response to ART. With effective viral suppression, CD4 count should increase by at least 50 cells/microliter after 4 to 8 weeks of treatment and by approximately 100 to 150 cells/microliters increase from baseline at one year.
CD4 cell count is a laboratory test that measures the number of CD4 T-cells. The normal range is between 500 to 1500 cells/mm^3. Clinicians use this test to monitor the destruction of CD4 cells, and it also monitors the effectiveness of the antiretroviral treatment (ART).
Normal CD4 count for healthy adults and teens: 500 to 1,200 cells per cubic millimeter. Low CD4 count: Below 500 cells per cubic millimeter. If you have HIV, a low CD4 count means that HIV has weakened your immune system. A CD4 count of 200 or fewer cells per cubic millimeter means that you have AIDS.
CD4 counts measure the number of cells per cubic millimeter of blood (cells/mm 3). A person’s ideal CD4 count can vary according to certain factors, such as age or certain health conditions.
The CD4 count is a test that measures how many CD4 cells you have in your blood. These are a type of white blood cell, called T cells, that move throughout your body to find and destroy...
A normal CD4 cell count is about 500 to 1,500 cells per cubic millimeter of blood (a cubic millimeter is a very small amount, about one drop). The number of CD4 cells a person has – their "CD4 count" – usually decreases as HIV disease gets worse.