What is the normal range for CD4+ cells in the human body?
A) 7300 to 600 CD4+ cells/mm3
B) 500 to 800 CD4+ cells/mm3
C) 700 to 1000 CD4+ cells/mm3
D) 900 to 1200 CD4+ cells/mm3
Ans: C
Feedback: Most people have about 700 to 1000 CD4+ cells/mm3, but a level as low as 500 cells/mm3 can be considered within normal limits. Therefore options A, B, and D are incorrect.
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