Michael Osterholm, PhD, MPH, founding director of the Center for Infectious Disease Research and Policy (CIDRAP), member of the Vaccine Integrity Project, and the author, with Mark Olshaker, of the forthcoming book, The Big One: How We Must Prepare for Future Deadly Pandemics (Little, Brown Spark, 2025), talks about RFK Jr.'s cuts to mRNA vaccine development and what they mean for public health and science, plus other vaccine-related news.