Dr Chrysi Sergaki is the Microbiome Group Leader at the Medicines and Healthcare products Regulatory Agency (MHRA), UK, leading the microbiome standardisation programme, as well as research projects on microbiome, AMR, microbial diagnostics and cancer immunotherapy irAEs.

She has led the establishment of the first three WHO International Reference Reagents for the microbiome, by co-ordinating international collaborative studies and the development of a guidance document for microbe-based medicinal products, to facilitate the regulatory process and ensure patient safety.

Before joining the MHRA, Chrysi completed her PhD at the University of Warwick, UK, researching microbial interactions and their impact on the host.