1 Department of Clinical Virology, University College London Hospitals NHS Trust, London, UK.
2 Centre for Perinatal Brain Protection and Repair, Department of Obstetrics and Gynaecology, University College London, London, UK.
3 Department of Science, Technology, Engineering and Public Policy, University College London, London, UK.
4 Fetal Medicine Unit, University College London Hospitals NHS Trust, London, UK; EGA Institute of Women's Health, University College London, London, UK.
5 Department of Clinical Virology, University College London Hospitals NHS Trust, London, UK; Department of Infection, Immunity and Inflammation, UCL Great Ormond Street Institute of Child Health, London WC1N 1EH, UK. Electronic address: [email protected].