Wasn't there a lady in Africa (a prostitue I think) who was found to be immune to HIV and who has passed that immunity to her offspring...
Perhaps you are thinking of natural allelic variants in the
CCR5 gene - CCR5 is used by HIV to interact with and infect cells.
Some CCR5 variants prevent infection all together, while others delay onset of AIDS or the extremity of AIDS. Other variants in CCR5 actually accelerate onset of AIDS.
Her body is able to rapidly adapt and provide immunity to the changes that the HIV virus mutates into.
Given what I know about HIV biology, a human "adapting" as fast as the virus is impossible - perhaps this statement is a misinterpretation or exaggeration by a non-science source...