Well, one thing that they are looking into is the removal of a specific gene(?) that HIV/AIDS binds to. It's the same place that many diseases bind to, and some people naturally do not have it (and are therefore immune, basically, to those illnesses).
http://www.natap.org/2005/ICAAC/icaac_9.htm
http://www.niaid.nih.gov/factsheets/howhiv.htm
So some organizations are looking at suppressing/disrupting the CCR5 gene which would prevent the travel of HIV through the body. However, I am not one of the above mentioned specialists... so additional input should be had on this topic.
