HIV / AIDs has for quite some time not been the death sentence it once was, but rather is a treatable chronic disease.
Of course a person impacted by it still needs to be mindful that they take good physical and emotional care, to protect themselves and others.
Thus the single greatest preventative measure to STI transmission is knowledge and education on their transmission.
As to conspiracy theories, I can't say that I subscribe to any that say that the government is trying to practice genocide, or large pharmaceutical companies are engaging in sheer profiteering.
I do feel that the cost of anti-retrovirals has and is coming down, and that there is a cure in the forseeable future for this pandemic.
As to the efficacy of socialized medicine, we may look to the health care systems of the Veteran's Administration, Medicaid / Medicare and sliding scale and free care medicine, albeit those are limited in the scope of the numbers that they serve.
I would also count myself as a proponent of the health care reform put forth by President Obama. To those that say that it will bankrupt us, I say that perhaps we need to rein in the costs of medical care, which is in large part driven by high malpractice premiums, and yes it is also due to the high costs of medications that we alluded to before.