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A questionnaire detailing the presence of 12 symptoms in the 7 days after blood donation was administered. Data from PDI donors whose plasma tested SARS-CoV-2 RNA–positive (n = 194) and RNA–negative (N = 1,349) are shown. Symptom frequency was compared using a 2-tailed χ2 test; *P < 0.05, ****P < 0.0001. #Excluding rash at the phlebotomy site.
