Umm Why Isn't There a Cure for AIDS?

Sometimes, well actually all the time, I have very random thoughts. Recently, I was thinking why isn't there a cure for AIDS?

Everyone remembers when Earvin "Magic" Johnson was interviewed by Linda Ellerbee back in the early 1990s and announced he had contracted HIV. That was such a different day and age. I remember watching movies like Philadelphia where Denzel Washington's character was afraid to shake Tom Hanks' hand because at that time no one knew how the virus was spread. There was such a huge stigma attached to those who had HIV and AIDS.

Fast forward to 2009, and Magic says that he no longer has HIV. Well, I guess it's not that he doesn't have HIV but because of the medication he takes, his HIV hasn't progressed and when he takes tests they come up as Negative.
What I want to know is, how many people really live with HIV for 15-20 years? I know he's rich but how could he be the only one who's been able to keep the virus from turning into full-blown AIDS after all these years. Does anyone else think this is strange?

Another thing...When women with HIV/AIDS have babies doctors give them certain medications which help to prevent them from transferring the virus to their newborns. (http://www.avert.org/motherchild.htm) If this concept help lessen the spread of the virus from mother-to-child through vaginal birth, why hasn't a drug been invented that these same women could take to keep them from infecting their partners?

I'm not a doctor nor do I claim to be knowledgeable about infectious diseases. I just want to know why it seems like the spread of AIDS is getting worse. It's scary to think Washington, D.C., the Nation's Capital, has more people infected with HIV/AIDS than some West African countries, according to the results of a 2008 study that were announced in March of 2009, click here to read more. Some things just don't make sense and the fact that we don't seem any closer to finding a cure for AIDS is one of those things. Just my thoughts.