I'm a SNF Ambizione fellow, working on genomics, evolution and epidemiology of microbial pathogens. Microbial pathogens are an integral part of earth’s ecosystems, and virtually all living organisms are challenged by pathogens at some stage of their life. The study of pathogens profited greatly from the improvements in sequencing techniques of the last two decades. The drop in the cost of sequencing, and the development of statistical and computational methods to analyze sequence data, opened the way to large scale population genomic analyses. For many pathogens, population genomics and molecular epidemiology have become crucial tools for research, but also for surveillance, monitoring and diagnostic.