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Flow data for a healthy donor (top panel) and a HIV positive patient. CD3 is a T-cell marker, CD4 is ...

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Flow data for a healthy donor (top panel) and a HIV positive patient. CD3 is a T-cell marker, CD4 is on helper T cells, and CD8 is on cytotoxic T cells. The number of CD3+ CD4+ dual positive cells is dramatically decreased in HIV patients. Source: Reprinted by permission of Paul Wallace and the Department of Flow Cytometry.
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