No Evidence of SARS-CoV-2 Transfusion Transmission Despite RNA Detection in Blood Donors Showing Symptoms after Donation.

The risk of transfusion-associated transmission of SARS-CoV-2 is unknown. Cappy and colleagues report on hemovigilance studies of 268 blood donations from individuals reporting symptoms shortly after donation. Of 268 samples, 3 tested positive for viral RNA, of which 1 had components that were transfused before testing; no cases of transfusion-documented transmission were seen.