IB has received support from the British Society for Haematology for attending meetings and declares research grants from the National Institute for Health and Care Research. BM declares research grants paid to their institution from the National Heart, Lung, and Blood Institute (NHLBI) of the US National Institutes of Health (NIH). BA declares research grants paid to their institution from NHLBI-NIH. LA-A declares research grants paid to their institution from NHLBI-NIH and Global Blood Fund and support from The Harvard Radcliffe Institute for attending a meeting. MD declares research grants from the NIH and is chairperson for the BLOODSAFE research programme. MD declares honoraria for presenting at grand rounds and is a board member volunteer for Association for the Advancement of Blood & Biotherapies for which they receive no payment. CTT declares research grants from NIH, the University of California San Francisco, Vitalant Research Institute, Grifols, Institut de Recherche pour le Développement, and Roche. CTT declares consulting fees from the Africa Society for Blood Transfusion, Safe Blood for Africa Foundation, Swiss Red Cross, and WHO; honoraria for lectures from Universite libre de Bruxelles; support for attending meetings from Societe Francophone de Transfusion Sanguine (SFTS) and The Harvard Radcliffe Institute; and participation on an advisory board for SFTS.