CD4 percentage

The proportion of all lymphocytes (white blood cells) that are CD4 cells is called the CD4 percentage. In HIV-negative people, a normal result is 40%. Among HIV-positive people the CD4 percentage tends to decline as HIV disease progresses.

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International Union of Immunological SocietiesUniversity of South AfricaInstitute of Infectious Disease and Molecular MedicineElizabeth Glazer Pediatric Aids FoundationStellenbosch University