An epidemic that's been sustained for 44 years might finally be quelled, with the milestone approval of the first HIV drug that offers 100% protection with its twice-yearly injections. It's a landmark achievement that stands to save millions of lives across the globe. The makers are also providing affordable access to the drug in the US and beyond, signing royalty-free licensing agreements with six generic manufacturers to produce and supply it.In the US, the Food and Drug Administration (FDA) h...