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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.
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Cappy et al. (2020) studied this question.
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