The normal ratio of CD4to CD8 is
Ref Robbins 9/e p190-191 A normal CD4/CD8 ratio is 2.0, with CD4lymphocytes equal to or greater than 400/mm3 and CD8 lymphocytes equal to 200 to 800/mm3. If your ratio is higher than 2, it means your immune system is strong and you may not have HIV. If your ratio is less than 1, you may have: HIV.
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General anatomy