What is ‘structure-based’ vaccine design? Before scientists used these techniques to design vaccines against Covid, they were testing them in the lab to combat RSV. Keren Landman joins the show to talk about how this respiratory virus endangers the lives of babies and the elderly. Then, we hear about an early RSV vaccine trial that cast a shadow over modern research, and how scientists, including our guests Jason McLellan and Barney Graham, later figured out how to create and stabilize a viral antigen’s spike protein to fight RSV.