About this talk

Join us for the Francis Crick Prize Lecture delivered by Professor Kayla King. The Francis Crick Medal and Lecture 2026 is awarded to Professor Kayla King for contributions to the fields of evolutionary biology and genetics of infectious disease. Why are some infections more harmful than others? Pathogens can have huge potential to evolve higher (or lower) virulence over short periods of time. In this lecture, Professor Kayla King will explore the rapid evolution of pathogens across the tree of life. Drawing on evolutionary theory, genome sequencing, and selection experiments in which bacterial and viral pathogens are passaged in the lab, she will reveal what drives these evolutionary changes in virulence, as well as the consequences for pathogen genomes and host health. Professor King will present examples of pathogens evolving within weeks in response to host immunity and warming temperatures. The lecture will ultimately discuss the implications of her group's research for predicting pathogen virulence and patterns of genomic evolution in a changing world. Amidst an increased risk of zoonoses jumping to protected species and humans, a better understanding of pathogen virulence evolution has never been more important. Live subtitles will be available in-person and virtually. The lecture can be attended in-person at the Royal Society with doors opening at 6pm BST, or livestreamed online via the Royal Society YouTube channel with live Q&A via Slido.

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