Here's a link to the site for anyone who might be studying or researching this disease...
http://www.amfar.org/cgi-bin/iowa/index.html
For a more global view of statistics try this one...
http://web.amfar.org/treatment/index.asp
As for the facts, they do a pretty good job of covering the subject. Each of these sites will offer information on programs, events, up to date news on the latest research findings and some ways you can help, such as donating your time or financial assistance. It is definitely a spreading disease. It has no prejudice on who it might attack. It's a worlwide problem, although most prevalent in Africa. At the present time, there are more orphan children in Africa than the shelters can accomodate, due to premature deaths of parents and relatives who are either not equiped or not inclined to take responsibility for. It's a very sad situation to say the least.