A patent has been held by the US patent office which claims to have found a means to kill the AIDS virus within humans by the use of a molecular scale tetrasilver tetroxide crystal. This patent is owned by Dr. Marvin S. Antelman. Here is a link to the patent that was filed almost 2 decades ago.
So if a cure was found and released publicly, the US economy would be out 20 billion dollars, would be unable to pay people who are employed under jobs related to AIDS research because there would be no AIDS research to be done. Jobs would be lost, campaigns would end, grants would cease, and donations from the public would stop coming in. Not to mention, an estimated 2 million people die from AIDS each year, so population increases would be another issue they would have to deal with.
Source : spiritscienceandmetaphysics.com