Magist Sign up I’ve been working in global health for two and a half decades now, and the transformation in how we fight HIV/AIDS is one of the most remarkable achievements I’ve witnessed. (It’s second only to how vaccines have saved millions of children's lives.) At the dawn of the AIDS epidemic, an HIV diagnosis was often a death sentence. But in the years since, so much has changed. Today, not only do we have anti-retroviral medications that allow people with HIV to live full, healthy lives with undetectable viral loads—meaning they can’t transmit the virus to others. We also have powerful preventative medications known as PrEP, or pre-exposure prophylaxis, that can reduce a person’s risk of contracting the virus by up to 99 percent when taken as prescribed. It’s an incredible feat of science: a pill that virtually prevents HIV contraction. In theory, if we could get these tools to everyone who needs them and make sure they’re used correctly, we could stop HIV...