Making this year's list: The Food and Drug Administration has approved the antiretroviral medication Truvada to reduce the risk of HIV infection in uninfected individuals. That biomedical prevention strategy is known as pre-exposure prophylaxis or PrEP.
Truvada becomes the first medication ever to be approved for HIV prevention in adults, marking a major milestone in the 30-plus years of the global epidemic. But many questions remain around adherence, risk, access .. as well as the outrageous $14,000 annual price tag. Meanwhile, there are promising developments in the decades-long quest for an HIV vaccine.
PrEP, vaccines, the Affordable Care Act, escalating criminal prosecutions, the gender divide, race and other issues are in the "10 HIV/AIDS Stories That Defined 2013 in the U.S." my year in review special for The Body. This is my second year reporting their annual wrap. The first time was on World AIDS Day 2011.