1. Real-time Syndromic Surveillance Team, Centre for Infectious Disease Surveillance and Control, National Infection Service, Public Health England, Birmingham, UK
2. Field Epidemiology Service, National Infection Service, Public Health England, Birmingham, UK
3. Healthcare Associated Infection Surveillance, Centre for Infectious Disease Surveillance and Control, National Infection Service, Public Health England, London, UK
4. Department of Clinical and Experimental Medicine, School of Biosciences and Medicine, University of Surrey, Guildford, UK
5. UCL Institute of Health Informatics, London, UK