From what I know (which is very little though I follow the news with excitement) HIV is "suppressed" by making it untestably low, which means (apparently) that

From what I know (which is very little though I follow the news with excitement) HIV is "suppressed" by making it untestably low, which means (apparently) that you are also not contagious. IIRC, therefore maybe you are a carrier, but you experience no symptoms, will not develop AIDS, cannot be proven to be a carrier via testing, and are not contagious. Good enough. However, in this particular treatment, it was via bone marrow donation, so it literally did change the DNA / body.