Relation between ABO and RhD and prevalence and severity of COVID-19 disease

Backgrounds: This study aims to determine the relation between ABO and RhD and the prevalence and severity of COVID-19 disease. Methods: Data of 495 SARS-CoV-2 infected patients admitted to hospitals were collected. The ABO and RhD were determined for each patient to detect any possible relation between the prevalence of SARS-CoV-2 infection and each blood group. The patients were followed up to determine oxygen saturation and surveillance outcome (died or improved) to detect any possible relation between the severity of COVID-19 disease and each blood group. Results: A+ blood group was found to have a percentage of 32.3%, O+ to have a percentage of 30.3%, B+ to have a percentage of 21.2%, and AB+ to have a percentage of 10.1%. 19% of all the patients died. 20% of the dead patients were with O+ blood group, 60.5% were with A+ blood group, 10% with B+ blood group and 5% were with O- blood group. The mean ± SD oxygen saturation on hospital admission was 94.2 ± 6.2% for the patients with O+ blood group, 91.06 ± 7.5% for the patients with A+ blood group, 92.8 ± 6.9% for the patients with B+ blood group, 93.4 ± 3.5% for the patients with AB+ blood group, and 94.5 ± 5.9% for the patients with O- blood group. Conclusion: Blood group A+ was the most common in the COVID-19 patients followed by O+ then B+ then AB+. Patients with blood group A+ had the worst oxygen saturation at hospital admission and had a higher mortality rate.