1. Manchester Medical Microbiology Partnership, Manchester Royal Infirmary, Manchester, United Kingdom
2. Meningococcal Reference Unit, Manchester Royal Infirmary, Public Health England, Manchester, United Kingdom
3. Immunisation and Countermeasures Division, Public Health England, London, United Kingdom
4. Blood Safety, Hepatitis, Sexually Transmitted Infections & HIV Division, Public Health England, London, United Kingdom
5. The Northern Integrated Contraception, Sexual Health & HIV Service, Manchester Royal Infirmary, Manchester, United Kingdom
6. Chelsea and Westminster Hospital NHS Foundation Trust, London, United Kingdom
7. Paediatric Infectious Diseases Research Group, St George's University of London, London, United Kingdom