How can better institutional food be part of the solution for other problems? Chef and food activist Joshna Maharaj explores that in her latest book, "Take Back the Tray: Revolutionizing Food in Hospitals, Schools, and Other Institutions."

Epidemiologist David Waltner-Toews discusses his book, "On Pandemics: Deadly Diseases from Bubonic Plague to Coronavirus," on how viruses begin, how they spread, and how past pandemics have been handled.