When HIV progresses to AIDS, there is a gradual destruction of the immune system, measured by:
1. decline in CD4 receptors.
2. decline in CD4 lymphocytes.
3. decline in platelet count.
4. decline in red blood cells.
Correct Answer: 2
Rationale 1: The progression to AIDS is measured by a decline in CD4 lymphocytes, not in the amount of CD4 receptors.
Rationale 2: The progression to AIDS is measured by a decline in CD4 lymphocytes.
Rationale 3: The progression to AIDS is measured by a decline in CD4 lymphocytes, not in the platelet count.
Rationale 4: The progression to AIDS is measured by a decline in CD4 lymphocytes, not in red blood cells.
Global Rationale: Progression to AIDS is characterized by gradual destruction of the immune system, as measured by the steady decline in the number of CD4 lymphocytes. Progression is not measured by the amount of CD4 receptors, platelet count or red blood cell count.
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