Which lab assays are used to determine the stage of HIV infection and guide treatment selection?

Updated: Jun 23, 2020
  • Author: Philip A Chan, MD, MS; Chief Editor: John Bartlett, MD  more...
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Individuals who are diagnosed with HIV should have additional laboratory testing at entry into medical care and at the initiation of treatment (see below). Additional laboratory tests include HIV viral load, CD4 cell count, and antiretroviral resistance testing which allow clinicians to determine the stage of infection and to decide on appropriate treatment regimens.

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