1 Healthcare-Associated Infection & Antimicrobial Resistance Division, UK Health Security Agency, London NW9 5EQ, UK. Electronic address: theresa.lamagni@ukhsa.gov.uk.
2 Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, UK.
3 Healthcare-Associated Infection & Antimicrobial Resistance Division, UK Health Security Agency, London NW9 5EQ, UK.
4 Reference Services Division, UK Health Security Agency, London NW9 5EQ, UK; WHO Collaborating Centre for Diphtheria and Streptococcal Infections, UK Health Security Agency, London NW9 5EQ, UK.