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HIV/AIDS Glossary

CD4 Percentage

Synonym(s): CD4 Cell Percentage, CD4 T Lymphocyte Percentage

Percentage of white blood cells that are CD4 T lymphocytes (CD4 cells). In certain cases, such as during acute HIV infection or HIV infection in children younger than 5 years of age, CD4 percentage is used rather than CD4 count to assess HIV progression or response to antiretroviral therapy (ART).

Related Term(s): CD4 Count, CD4 T Lymphocyte, HIV Progression

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