Which of the following laboratory tests best evaluates HIV disease?

Question

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The CD4 count is the most specific laboratory test for evaluating the progression of HIV disease. The CD4 count measures the number of T-helper cells in a person's blood, which are often destroyed by HIV, leading to weakened immune function and increased susceptibility to infections. Platelet counts and complete blood counts can provide information on the body's response to HIV infection, but they are not as specific as the CD4 count. Liver function studies may be affected by medications used to treat HIV, but they are not specific for evaluating HIV disease.

Which of the Following Laboratory Tests Best Evaluates HIV Disease