COVID-19 systematic screening of asymptomatic haematopoietic stem cell donors: Less if often more.

From COVID pandemic spread until now, many HSCT unrelated donor registries recommend as a precaution a systematic COVID-19 testing for all donors during the precollection time. Literature is quite poor to support this systematic attitude. We report one sibling allogeneic HSCT which we proceeded despite a positive COVID test on related asymptomatic donor and summarize the all seven cases reported until now.