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Michael Osterholm: How Bad Will the Next Pandemic Be?

Thought Leader: Michael Osterholm
October 3, 2025
Source: Sam Harris

Sam Harris speaks with Michael Osterholm about his new book, The Big One: How We Must Prepare for Future Deadly Pandemics. They discuss the lessons learned from the COVID-19 pandemic, the major mistakes made in the public health response—including lockdowns, school closures, and border policies—the science of airborne versus droplet transmission, the promise and controversy of mRNA vaccines, the reality of vaccine adverse events, the politicization of vaccine hesitancy, and the erosion of scientific institutions like the CDC and HHS under the Trump administration. Looking forward, they explore the characteristics of a future, more deadly pandemic—what Osterholm calls “The Big One”—and what we should be doing to prepare for it. Michael Osterholm, PhD, MPH, is Regents Professor, McKnight Presidential Endowed Chair in Public Health, and director of the Center for Infectious Disease Research and Policy (CIDRAP) at the University of Minnesota. He is also a Distinguished Teaching Professor in the Division of Environmental Health Sciences, School of Public Health; a professor in the Technological Leadership Institute, College of Science and Engineering; and an adjunct professor in the medical school. In early 2025, Dr. Osterholm and colleagues founded the Vaccine Integrity Project, a key initiative dedicated to safeguarding vaccine use in the United States. He is also the author of the new book The Big One: How We Must Prepare for Future Deadly Pandemics.

Michael Osterholm is Regents Professor and McKnight Presidential Endowed Chair in Public Health at the University of Minnesota, where he founded and directs the Center for Infectious Disease Research and Policy (CIDRAP). An internationally renowned epidemiologist with fifty years of experience, he’s led major outbreak investigations worldwide and authored over 350 papers. He served as a U.S. State Department science envoy from 2017-2019. His new book is The Big One: How We Must Prepare for Future Deadly Pandemics. To host him for a speaking opportunity, contact WWSG.

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