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Normal range: Normal intervals for CD4 and CD8 vary with age

Cell count x 109/L

Age                    CD4                  CD8

Neonate           1.5-2.4              1.2-2.0

Infant               1.7-2.8              0.8-1.2

yrs 1-6            1.0-1.8              0.8-1.5

yrs 7-17          0.7-1.1              0.6-0.9

Adult                0.5-1.4              0.2-0.7

Comment: The CD4 antigen is the receptor for the human immunodeficiency virus (HIV). The absolute CD4 count is a criterion for categorizing HIV- related clinical conditions

Sample: EDTA whole blood