Vas Narasimhan is the CEO of Swiss drug giant Novartis. With a medical degree from Harvard, and a public policy degree from the Kennedy School of Government, he has unique and specialized insight into the COVID-19 pandemic. On this episode of Leadership Next, Narasimhan speaks with Fortune editor-in-chief Clifton Leaf. The two dive into a detailed discussion about the challenges in developing and manufacturing a vaccine. They also discuss the fragilities in our healthcare system, preparing for the next pandemic, what it takes to lead during crisis, and why being a global company will help Novartis weather this storm.