1 University Hospitals Sussex NHS Foundation Trust, Brighton, UK [email protected].
2 Brighton and Sussex Medical School, Brighton, UK.
3 Guy's and St Thomas' Hospitals NHS Trust, London, UK.
4 Leeds Teaching Hospitals NHS Trust, Leeds, UK.
5 United Kingdom Health Security Agency (UKHSA), London, UK.
6 National Institute for Health and Care Research Health Protection Research Unit (NIHR HPRU) in Blood Borne and Sexually Transmitted Infections, University College London, London, UK.
7 Chelsea and Westminster Hospital NHS Foundation Trust, London, UK.