SARS-CoV-2 Serology Assay Evaluation Group, Mark Ainsworth, Monique Andersson, Kathryn Auckland, J Kenneth Baillie, Eleanor Barnes, Sally Beer, Amy Beveridge, Sagida Bibi, Luke Blackwell, Martyna Borak, Abbie Bown, Tim Brooks, Nicola A Burgess-Brown, Susana Camara, Matthew Catton, Kevin K. Chau, Thomas Christott, Elizabeth Clutterbuck, Jesse Coker, Richard J Cornall, Stuart Cox, David Crawford-Jones, Derrick W Crook, Silvia D'Arcangelo, Wanwisa Dejnirattsai, Julie M M Dequaire, Stavros Dimitriadis, Kate E Dingle, George Doherty, Christina Dold, Tao Dong, Susanna J Dunachie, Daniel Ebner, Marc Emmenegger, Alexis Espinosa, David W Eyre, Rory Fairhead, Shayan Fassih, Conor Feehily, Sally Felle, Alejandra Fernandez-Cid, Maria Fernandez Mendoza, Thomas H Foord, Thomas Fordwoh, Deborah Fox McKee, John Frater, Veronica Gallardo Sanchez, Nick Gent, Dominique Georgiou, Christopher J Groves, Bassam Hallis, Peter M Hammond, Stephanie B. Hatch, Heli J Harvala, Jennifer Hill, Sarah J Hoosdally, Bryn Horsington, Alison Howarth, Tim James, Katie Jeffery, Elizabeth Jones, Anita Justice, Fredrik Karpe, James Kavanagh, David S Kim, Richard Kirton, Paul Klenerman, Julian C Knight, Leonidas Koukouflis, Andrew Kwok, Ullrich Leuschner, Robert Levin, Aline Linder, Teresa Lockett, Sheila F Lumley, Spyridoula Marinou, Brian D Marsden, Jose Martinez, Lucas Martins Ferreira, Lara Mason, Philippa C Matthews, Alexander J Mentzer, Alexander Mobbs, Juthathip Mongkolsapaya, Jordan Morrow, Shubhashish M M Mukhopadhyay, Matthew J Neville, Sarah Oakley, Marta Oliveira, Ashley Otter, Kevin Paddon, Jordan Pascoe, Yanchun Peng, Elena Perez, Prem K Perumal, Timothy E A Peto, Hayleah Pickford, Rutger J Ploeg, Andrew J Pollard, Anastasia Richardson, Thomas G Ritter, David J Roberts, Gillian Rodger, Christine S Rollier, Cathy Rowe, Justine K Rudkin, Gavin Screaton, Malcolm G Semple, Alex Sienkiewicz, Laura Silva-Reyes, Donal T Skelly, Alberto Sobrino Diaz, Lizzie Stafford, Lisa Stockdale, Nicole Stoesser, Teresa Street, David I Stuart, Angela Sweed, Adan Taylor, Hannah Thraves, Hoi P Tsang, Marije K Verheul, Richard Vipond, Timothy M Walker, Susan Wareing, Yolanda Warren, Charlie Wells, Clare Wilson, Kate Withycombe, Rebecca K Young