Public Health England Colindale, Public Health England Colindale, Public Health England Colindale, Public Health England Colindale, Public Health England Colindale, Public Health England Colindale, Public Health England Colindale, Public Health England - Immunisation and Countermeasures Division, Public Health England Colindale, Public Health England Colindale, Public Health England Colindale, Public Health England Colindale, Public Health England Colindale, Public Health England Colindale, affiliation not provided to SSRN, Public Health England Colindale, Public Health England Colindale, Public Health England - Immunisation, Hepatitis, and Blood Safety Department, Public Health England Colindale and University of Oxford - NIHR Health Protection Research Unit in Healthcare Associated Infection and Antimicrobial Resistance

Government of the United Kingdom - Immunisation and Countermeasures Division, Public Health England - Immunisation and Countermeasures Division, Public Health England Colindale, Public Health England - Immunisation, Hepatitis, and Blood Safety Department and Public Health England - Immunisation and Countermeasures Division

Public Health England Colindale, University College London - Institute for Health Informatics, University College London - Institute for Global Health, University College London - Institute for Health Informatics, University College London - Institute for Health Informatics, Public Health England, University College London - Institute for Health Informatics, Department of Health and Social Care, Palantir Technologies, University of Birmingham - Institute of Immunology and Immunotherapy, Public Health England Colindale, University College London - Research Department of Epidemiology & Public Health, University College London - Institute for Global Health and University College London - Institute for Health Informatics

University of Oxford, University of Oxford - Nuffield Department of Primary Care Health Sciences, University College London - Institute for Global Health, University of Oxford - Nuffield Department of Primary Care Health Sciences, University of Oxford - Nuffield Department of Primary Care Health Sciences, Public Health England - Immunisation and Countermeasures Division, Public Health England Colindale, University of Oxford - Nuffield Department of Primary Care Health Sciences, Public Health England - National Infection Service, Government of the United Kingdom - Public Health England, Government of the United Kingdom - Public Health England, University of Oxford - Nuffield Department of Primary Care Health Sciences, Public Health England Colindale, University of Oxford - Nuffield Department of Primary Care Health Sciences, Public Health England - Immunisation, Hepatitis, and Blood Safety Department, University of Oxford - Nuffield Department of Primary Care Health Sciences, University of Oxford - Nuffield Department of Primary Care Health Sciences, Royal College of General Practitioners - Royal College of General Practitioners (RCGP) Research and Surveillance Centre (RSC), Public Health England - Virus Reference Department, University of Oxford - Nuffield Department of Primary Care Health Sciences, University of Oxford - Nuffield Department of Primary Care Health Sciences and University of Oxford - Nuffield Department of Primary Care Health Sciences

Public Health England Colindale, Government of the United Kingdom - Public Health England, Government of the United Kingdom - Public Health England, Government of the United Kingdom - Public Health England, Public Health England - Immunisation and Countermeasures Division, Government of the United Kingdom - Public Health England, University College London - Department of Computer Science, Public Health England Colindale, Government of the United Kingdom - Public Health England, Government of the United Kingdom - Public Health England, Government of the United Kingdom - Public Health England, Government of the United Kingdom - Public Health England, Government of the United Kingdom - Public Health England, University of Oxford - Nuffield Department of Primary Care Health Sciences, University of Oxford - Nuffield Department of Primary Care Health Sciences, University of Oxford - Nuffield Department of Primary Care Health Sciences, University of Oxford - Nuffield Department of Primary Care Health Sciences, University of Oxford - Nuffield Department of Primary Care Health Sciences, Public Health England - Virus Reference Department, University of Oxford - Nuffield Department of Primary Care Health Sciences, Public Health England, Public Health England - Immunisation and Countermeasures Division, Public Health England Colindale, Public Health England - Immunisation and Countermeasures Division, Government of the United Kingdom - Public Health England, Government of the United Kingdom - Public Health England, Government of the United Kingdom - Public Health England and Public Health England - Immunisation, Hepatitis, and Blood Safety Department

Public Health England - Immunisation and Countermeasures Division, Public Health England - Immunisation and Countermeasures Division, East London NHS Foundation Trust, Derbyshire Healthcare NHS Foundation Trust, University of Manchester - Manchester University NHS Foundation Trust, Birmingham Community Healthcare NHS Trust, Oxford University Hospitals NHS Foundation Trust, Oxford University Hospitals NHS Foundation Trust, Public Health England, Public Health England Colindale, Public Health England, Public Health England, Public Health England - Immunisation and Countermeasures Division, Public Health England - Immunisation and Countermeasures Division, Immunisation and Countermeasures Division, Public Health England, Public Health England - Immunisation and Countermeasures Division, Manchester Royal Infirmary, Public Health England, Vaccine Evaluation Unit, Public Health England, Manchester Royal Infirmary, Public Health England - Virus Reference Department, Public Health England, Government of the United Kingdom - Immunisation and Countermeasures Division, Public Health England - Immunisation and Countermeasures Division, Public Health England Colindale, Public Health England and Public Health England - Immunisation, Hepatitis, and Blood Safety Department

University of Oxford - Nuffield Department of Primary Care Health Sciences, University of Oxford - Nuffield Department of Primary Care Health Sciences, University of Oxford - Nuffield Department of Primary Care Health Sciences, Nuffield Department of Primary Care Health Sciences, University of Oxford, University of Oxford - Nuffield Department of Primary Care Health Sciences, Public Health England - Immunisation and Countermeasures Division, University of Oxford - Nuffield Department of Primary Care Health Sciences, Public Health England - National Infection Service, University of Oxford - Nuffield Department of Primary Care Health Sciences, Government of the United Kingdom - Public Health England, University of Oxford - Nuffield Department of Primary Care Health Sciences, University of Oxford - Nuffield Department of Primary Care Health Sciences, Public Health England Colindale, Royal College of General Practitioners, Nuffield Department of Primary Care Health Sciences, University of Oxford, University of Oxford - Nuffield Department of Primary Care Health Sciences, University of Oxford - Nuffield Department of Primary Care Health Sciences, Public Health England - Immunisation, Hepatitis, and Blood Safety Department, Nuffield Department of Primary Care Health Sciences, University of Oxford, Government of the United Kingdom - Public Health England, Public Health England - Virus Reference Department, Royal College of General Practitioners - Royal College of General Practitioners (RCGP) Research and Surveillance Centre (RSC), University of Oxford - Nuffield Department of Primary Care Health Sciences and University of Oxford