How about an explanation in non-Laymans terms?...If HIV is not the source of AIDS, then what is?
I’m glad you asked. Prof. Peter Duesberg’s most recent paper on AIDS summarizes the evidence against the HIV/AIDS hypothesis, and points to the evidence the suggests the real cause(s) of AIDS.
http://www.duesberg.com/papers/chemical-bases.html
Duesberg's claims have been rejected by the scientific community and are not supported by data.
http://en.wikipedia.org/wiki/Duesberg_hypothesis
HIV as a cause of AIDS meets Koch's postulates.
http://www.niaid.nih.gov/Factsheets/evidhiv.htm