Non-ABO red cell antibodies and risk of COVID-19.

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It is not known whether non-ABO antibodies confers any protective effect against SARS-CoV-2 infection or COVID-19 severe illness, alone, or in conjunction with O blood group. This cohort study included 413,576 persons in Ontario, Canada with known ABO blood group and non-ABO antibody screen status, and who subsequently underwent SARS-CoV-2 viral RNA PCR testing between January and November 2020. The risk of SARS-CoV-2 infection or COVID-19 severe illness was not associated with the presence of non-ABO antibodies, even among persons with O blood group.

View the full article @ International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases
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Authors: Joel G Ray, Michael Colacci, Michael J Schull, Marian J Vermeulen, Alison L Park