It has been over three decades since the first cases of AIDS were observed in the United States, and in one month we will be marking the 30th anniversary of dual publications in Science attributing a novel retrovirus as the potential cause of AIDS.
Since this time, and in large part due to the development of antiretroviral therapy, mortality due to HIV & AIDS has significantly decreased, so much so that it is now considered a chronic rather than an acutely fatal disease. With these changes, HIV is also now becoming a disease of the elderly. By 2015, half of HIV positive individuals will be older than 50 years of age. [Emphasis mine]