This is really quite amazing, I can only imagine how happy the parents must be and eventually the girl herself when she gets older and realizes what could have happened. This is the first time anything like this has happened, so it is quite remarkable. The doctors are saying that it is probably because they began treatment when she was so young because they knew the mother was HIV positive.
http://www.cnn.com/2013/03/03/health/hiv-toddler-cured/index.html
http://www.cnn.com/2013/03/03/health/hiv-toddler-cured/index.html