1 Rare and Imported Pathogens Laboratory, UKHSA, Porton Down, Salisbury SP4 0JG, UK; Institute of Medical Sciences, University of Aberdeen, Abderdeen, UK.
4 High Containment & Biological Services, UKHSA, Porton Down, Salisbury, UK; Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, UK.
5 Genomic Public Health Analysis, UKHSA, Colindale, UK.
6 Tropical and Infectious Disease Unit, Liverpool University Hospitals NHS Foundation Trust, Liverpool, UK; Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK.
7 The Newcastle upon Tyne NHS Hospitals Trust, Newcastle, UK.
8 Department of Infectious Disease, Imperial College London, London, UK; NIHR Imperial Biomedical Research Centre, London, UK.
9 Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK.
10 Pandemic Sciences Institute, University of Oxford, Oxford, UK; Department of Infectious Diseases, Royal Free London NHS Foundation Trust, Royal Free Hospital, London, UK.
11 Health Protection Research Unit in Emerging and Zoonotic Infections, Institute of Infection, Veterinary and Ecological Sciences, Faculty of Health and Life Sciences, University of Liverpool, Liverpool, UK; Respiratory Department, Liverpool Institute for Child Health and Wellbeing, Alder Hey Children's Hospital, Liverpool, UK.
12 Gifford Pandemic Science Hub, Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK; Intensive Care Unit, Royal Infirmary of Edinburgh, Edinburgh, UK.
13 Rare and Imported Pathogens Laboratory, UKHSA, Porton Down, Salisbury SP4 0JG, UK; Department of Infectious Diseases, University College London NHS Hospitals Trust, London, UK.
14 Rare and Imported Pathogens Laboratory, UKHSA, Porton Down, Salisbury SP4 0JG, UK; Department of Clinical Virology, University College London NHS Hospitals Trust, London, UK. Electronic address: catherine.houlihan5@nhs.net.