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CD4 - number vs. percentage?
Sep 3, 2000

Hi doctor,

My CD4 count has varied from 370 to 650 since I tested positive 2 years ago. My doctor always emphasizes that my CD4 count is not as important as by cd4 percentage, which has remained relatively stable. What is a CD4 percentage, and what are "healthy" ranges for it? Thanks for your help.

Response from Dr. Holodniy

Lymphocytes are major kind of white blood cell. Lymphs are divided into T cells and B cells. The CD4 percentage is the percent or fraction of T cells that are CD4 positive (T helper cells). Every lab has somewhat different values, but in uninfected patients, the range is usually between 35-55%. MH



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