Cultural Factors, Mandates, and Herd Immunity Limits

Seth Berkley, MD, an infectious disease epidemiologist currently advising vaccine, biotechnology, and technology companies; an adjunct professor and senior adviser to the Pandemic Center at Brown University; former CEO of Gavi, the Vaccine Alliance; cofounded COVAX; founded and served as CEO of the International AIDS Vaccine Initiative; and the author of Fair Doses: An Insider’s Story of the Pandemic and the Global Fight for Vaccine Equity (University of California Press, 2025), talks about the need for vaccine equity and lessons learned (and ignored) from the COVID pandemic.