2) People who are HIV positive with high viral loads have a corresponding low CD4+ T cell count. When antiviral medication is used to reduce the viral load, CD4+ T cell counts go up. This correlation between viral load and CD4+ cell count is well documented.
3) People with low CD4+ T cell counts are susceptible to diseases that people with a functioning immune system are not usually susceptible to. This is what we call AIDS as they do have a deficient immune system. This correlation between CD4+ T cells and immune deficiency is also well documented.
Where exactly are you having problems?
I need references to peer reviewed articles in reputable medical journals. As far as I know there is no proof that HIV is the cause of AIDS. I'm looking for that study that proves it does. Show me that study. Just give me a link.