<< No, it does not test for HIV specifically. It will show tell-tale signs if you are infected, though. Namely a low T-Cell count. >>
this is totally wrong wrong wrong!
a cbc doesn't tell you a t-cell count. thats just plain wrong. it tells you your hemoglobin level, your platlet level, and your white blood cell count. if you get a cbc with a differential count, it can also tell you your lymphocyte count, but that is not the same a t-cell count.
the only way to tell is with an HIV test.
anybody trying to tell you that HIV can be diagnosed by a cbc is just plain dangerous, and wrong.