1. Regional Health Protection Team, North East England; UK Health Security Agency (UKHSA); Newcastle UK
2. NHS Lothian, Directorate of Public Health and Health Policy; Edinburgh UK
3. Effective Care Research Unit, Department of Obstetrics and Gynaecology; Faculty of Medicine, College of Health Sciences, Nnamdi Azikiwe University, Nnewi Campus; PMB 5001, Nnewi Nigeria
4. US Medical Affairs, Virology; Merck & Co., Inc; North Wales PA USA
5. Division of Maternal Fetal Medicine, Department of Gynecology and Obstetrics; Johns Hopkins University School of Medicine; Baltimore Maryland USA