1/19/2024 0 Comments O negative blood and covid 2021PRIMARY FUNDING SOURCE Ontario Academic Health Sciences Centre AFP Innovation Fund and the Ontario Ministry of Health and Long-Term Care. CONCLUSION: The O and Rh- blood groups may be associated with a slightly lower risk for SARS-CoV-2 infection and severe COVID-19 illness. LIMITATION: Persons who rapidly died of severe COVID-19 illness may not have had SARS-CoV-2 testing. ) and with Rh- versus Rh-positive (aRR, 0.82 ARD, -1. There was also a lower risk for severe COVID-19 illness or death associated with type O blood group versus all others (aRR, 0.87 ARD, -0. ), especially for those who were O-negative (O-) (aRR, 0.74 ARD, -8. Rhesus-negative (Rh-) blood type was protective against SARS-CoV-2 infection (aRR, 0.79 ARD, -6. The aRR of SARS-CoV-2 infection for O blood group versus A, AB, and B blood groups together was 0.88 (95% CI, 0.84 to 0.92 ARD, -3. The scientific evidence suggests that blood type O has the ability to protect its owner from coronavirus infection. RESULTS: A total of 225 556 persons were included, with a mean age of 54 years. Adjusted relative risks (aRRs) and absolute risk differences (ARDs) were adjusted for demographic characteristics and comorbidities. A second outcome was severe COVID-19 illness or death. MEASUREMENTS The main study outcome was SARS-CoV-2 infection, determined by viral RNA polymerase chain reaction testing. PATIENTS All adults and children who had ABO blood group assessed between January 2007 and December 2019 and who subsequently had SARS-CoV-2 testing between 15 January and 30 June 2020. OBJECTIVE: To determine whether ABO and Rh blood groups are associated with risk for SARS-CoV-2 infection and severe coronavirus disease 2019 (COVID-19) illness. ABSTRACT BACKGROUND: The ABO and rhesus (Rh) blood groups may influence risk for severe acute respiratory syndrome coronavirus 2 ( SARS-CoV-2) infection.
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