[/siz]
Some patients can block the development of HIV[/siz]
Scientists have identified why some HIV patients are immune from developing full-blown Aids.
It has been known for some time that around 2% of HIV patients were protected in some way.
But now, American and Chinese researchers have identified a group of proteins in the body which naturally block HIV developing into Aids.
http://news.bbc.co.uk/2/hi/health/2283351.stm