Carolyn Y. Johnson explains how the unsuccessful years-long hunt for an HIV vaccine could give scientists a leg up in developing a novel coronavirus vaccine. Carlos Lozada dissects Mary L. Trump’s new book. And Ben Golliver shares a glimpse from inside the NBA bubble at Disney World. Read more:Decades of research on an HIV vaccine boost the bid for one against coronavirus.The real villain of Mary L. Trump’s family tell-all isn’t Donald. It’s Fred.What’s it like in the NBA’s Disney bubble? For one reporter: Hotel room workouts and lots of time to think.Tell us what you think about Post Reports, and all The Washington Post’s audio projects.