Higher incidence of human herpesvirus 6 (HHV-6) infection has been documented after umbilical cord blood allo-transplant in adults. Here we demonstrate that HHV-6 reactivation persists for a very long time in half of the patients after this type of graft. Long-term immune reconstitution does not explain this event, which remains to be explained.
Keywords: HHV-6; PBSC; adults; allo-SCT; cord blood; immune reconstitution.
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