There is a drug that stops HIV completely. Really. It prevents the HIV virus getting into white...

There is a drug that stops HIV completely. Really. It prevents the HIV virus getting into white blood cells. HIV levels in people taking the drug drop below detectable levels. The catch? It costs US$20,000 annually -- it costs several hundred dollars per gram to produce, far less recouping the approximately $600m that it cost to develop and test the drug.