Differential occupational risks to healthcare workers from SARS-CoV-2 observed during a prospective observational study oleh David W Eyre, Sheila F Lumley, Denise O'Donnell, Mark Campbell, Elizabeth Sims, Elaine Lawson, Fiona Warren, Tim James, Stuart Cox, Alison Howarth, George Doherty, Stephanie B Hatch, James Kavanagh, Kevin K Chau, Philip W Fowler, Jeremy Swann, Denis Volk, Fan Yang-Turner, Nicole Stoesser, Philippa C Matthews, Maria Dudareva, Timothy Davies, Robert H Shaw, Leon Peto, Louise O Downs, Alexander Vogt, Ali Amini, Bernadette C Young, Philip George Drennan, Alexander J Mentzer, Donal T Skelly, Fredrik Karpe, Matt J Neville, Monique Andersson, Andrew J Brent, Nicola Jones, Lucas Martins Ferreira, Thomas Christott, Brian D Marsden, Sarah Hoosdally, Richard Cornall, Derrick W Crook, David I Stuart, Gavin Screaton, Oxford University Hospitals Staff Testing Group, Timothy EA Peto, Bruno Holthof, Anne-Marie O'Donnell, Daniel Ebner, Christopher P Conlon, Katie Jeffery, Timothy M Walker