1 UK Collaborative on Development Research, London, UK.
2 ISARIC Global Support Centre, Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7FZ, UK. Electronic address: piero.olliaro@ndm.ox.ac.uk.
3 ISARIC Global Support Centre, Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7FZ, UK.
4 Long Covid Support, UK.
5 McMaster Immunology Research Centre and Department of Medicine, McMaster University, Hamilton, ON, Canada.
6 Institute of Infection and Immunity Canadian Institutes of Health Research, Government of Canada, Ottawa, ON, Canada.