Professor Androulla Efstratiou is the Director of the WHO Global Collaborating Centre for Reference and Research on Diphtheria and Streptococcal Infections and Consultant Public Health Microbiologist at the UK Health Security Agency (formerly Public Health England). She is a Visiting Professor to the Faculty of Medicine, Department of Infectious Diseases, Imperial College, London and to the University of Cyprus Medical School. Other key appointments include consultancy and advisory roles for WHO and the European Commission on infectious diseases, notably bacterial vaccine preventable diseases. Her key specialist areas are within the field of diphtheria, streptococcal infections and global public health.