Which laboratory test is used to evaluate the degree of damage to the immune system caused by HIV?

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The CD4 T-cell count is used to evaluate the degree of damage to the immune system caused by HIV. This test measures the number of CD4 T-cells in a person's blood, which are the cells that HIV infects and destroys, leading to immunodeficiency. Platelets and liver function studies are not specific to HIV-related immune damage, while a complete blood count may show abnormalities but not provide specific information about HIV-related immune damage.

Which Laboratory Test Is Used to Evaluate the Degree of Damage