Family physician count and service provision in Ontario and Alberta between 2005/06 and 2017/18: a cross-sectional study
McDonald T, Schultz SE, Green LA, Lethebe BC, Glazier RH. CMAJ Open. 2023; 11(6):E1102-8. Epub 2023 Nov 28.
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.
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Ray JG, Colacci M, Schull MJ, Vermeulen MJ, Park AL. Int J Infect Dis. 2021; 108:179-82. Epub 2021 May 19.