University of Birmingham - Institute of Immunology and Immunotherapy, University of Birmingham - Institute of Immunology and Immunotherapy, University of Birmingham - Institute of Immunology and Immunotherapy, University of Birmingham - Institute of Immunology and Immunotherapy, University of Birmingham - Institute of Immunology and Immunotherapy, University of Birmingham - Clinical Immunology Service, University Hospitals Birmingham NHS Foundation Trust, Harborne Medical Practice, Public Health England, Public Health England - Immunisation and Countermeasures Division, Public Health England - National Infection Service, University of Birmingham - Institute of Cancer and Genomic Sciences and University of Birmingham - Institute of Immunology and Immunotherapy