The Biden administration recently approved nearly $10 billion to broaden access to PrEP, a medication that is 99% effective at preventing HIV and key to ending the nation’s HIV epidemic. Amy Killelea, a policy expert on HIV and public health financing, talks with Stephanie Desmon about why health policies have meant this game-changing drug hasn’t yet delivered on its potential, how experts hope Biden’s budget will build a better nationwide PrEP distribution system, and how much is at stake at this particular turning point in the epidemic.