4.7 Article

Impact of ABO and Rhesus blood groups on COVID-19 susceptibility and severity: A case-control study

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JOURNAL OF MEDICAL VIROLOGY
卷 94, 期 3, 页码 1162-1166

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WILEY
DOI: 10.1002/jmv.27444

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ABO; blood groups; COVID-19; pandemic; Rhesus; severity; susceptibility

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Early evidence from China suggested that blood groups may play a role in COVID-19 susceptibility, with A Rh+ blood type being associated with increased risk. However, our study found that while A Rh+ blood type increases susceptibility to COVID-19, it is not associated with higher disease severity. No significant relationship was found between COVID-19 and other blood groups.
Early evidence from China suggested that blood groups may be involved in susceptibility to COVID-19. Several subsequent studies reported controversial results. We conducted a retrospective matched case-control study that aims to investigate the association between blood groups and the risk and/or severity of COVID-19. We compared the blood groups distribution of 474 patients admitted to the hospital for COVID-19 between March 2020 and March 2021, to that of a positive control group of outpatients infected with COVID-19 and matched them for sex and age, as well as to the distribution in the general population. Three hundred and eighteen HC+ pairs with available blood group information were matched. The proportion of group A Rh+ in hospitalized patients (HC+) was 39.9% (CI 35.2%-44.7%), compared to 44.8% (CI 39.8%-49.9%) and 32.3% in the positive outpatient controls (C+) and the general population (C-), respectively. Both COVID-19-positive groups (HC+ and C+) had significantly higher proportions of group A Rh+ compared to the general population (p = 0.0019 and p < 0.001, respectively), indicating that group A Rh+ increases susceptibility to COVID-19. Although blood group A Rh+ was more frequent in the outpatients C+ compared to the hospitalized group HC+, the association did not reach statistical significance, indicating that blood group A Rh+ is not associated with severity. There was no significant relationship between COVID-19 and other blood groups. Our findings indicate that blood group A Rh+ increases the susceptibility for COVID-19 but is not associated with higher disease severity.

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