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People with A, B blood groups, Rh+ more likely to get COVID positive: Study
- Resus factor, also known as Rh factor, is a protein found on the surface of red blood cells
- The Rh factor is the positive or negative sign next to the blood groups
- The study was published in the November 21 edition of 'Frontiers in Cellular and Infection Microbiology'
A new study conducted by doctors at a Delhi hospital indicates that people with blood groups A, B, and Rh factor positive are “more susceptible to COVID-19 infection” than those with blood groups O or AB and Rh negative.
Sir Ganga Ram Hospital (SGRH) said in a statement on Tuesday that the study involved 2,586 COVID-positive patients who were admitted from April 8 to October 4 in 2020 and were tested using real-time PCR (RT-PCR).
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The study by the Department of Research and Department of Blood Transfusion Medicine at the SGRH “has found that (those having) blood groups A, B and Rh+ are more susceptible to COVID-19 infection whereas (those with) O, AB and Rh- are at lower risk of COVID-19 infection”, the statement said.
The researchers have also claimed that “there is no association between blood groups, and susceptibility to severity of disease as well as mortality”.
Resus factor, also known as Rh factor, is a protein found on the surface of red blood cells (RBCs).
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The Rh factor is the positive or negative sign next to the blood groups. If the blood type is positive, the Rh protein is present in the blood cells; if the blood type is negative, the Rh protein is absent.
According to the statement, the study was published in the November 21 edition of ‘Frontiers in Cellular and Infection Microbiology.’
Dr. Rashmi Rana, Consultant, Department of Research, SGRH, said, “Severe acute respiratory syndrome coronavirus 2 is a new virus, and it is unclear whether blood groups have any impact on COVID-19 risk or progression. Therefore, we investigated the association of ABO and Rh blood group with COVID-19 susceptibility, prognosis, recovery time, and mortality in this study”.
During the study of admitted patients, follow-up was also taken up till their last date of admission as either discharged or deceased, hospital authorities said.
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According to Dr. Vivek Ranjan, co-author and Chairperson, Department of Blood Transfusion, SGRH, “We also found that male patients of blood group B are more prone to COVID-19 than the female patients with blood group B, and blood group AB was observed to be more susceptible to infection in patients with age group of over 60 years.” The study also claimed that blood group A and Rh + types are associated with a decrease in recovery period, whereas blood group O and Rh- are associated with increase in recovery period, according to the statement.
“However, the ABO and/or Rh blood groups may not be responsible for this association, as these may indicate an unexplored underlying factor like co-morbidity. Therefore, larger, multicentre and prospective studies are needed to ascertain the relationship between blood groups and SARS-CoV-2,” it added.
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