COVID-19 still remains full of mysteries that are deciphered every day by medical professionals. With that in mind, Canadian and Danish researchers compared the health record data of more than 473,000 people who tested positive for COVID-19 and more than 2 million people without the disease. All of this to conclude that in those infected, the majority had blood types A, B and AB.
The researchers concluded that people with blood type O are 13% less at risk of being affected by COVID-19. On the other hand, group A is 9% more likely to have the disease, and AB, 15%. The group B rate was not significant. In addition, the team found no significant difference in the infection rate between types A, B and AB. That study was published in the journal Blood Advances.
It has been observed that the prevalence of blood type can vary considerably in different ethnic groups and different countries. “Denmark is a small country, but, very ethnically diverse, this has made it possible for us to do an appropriate screening to maintain a solid base of our analyzes,” says Torben Barington, a researcher at the University of Southern Denmark and one of the study’s authors , during a statement.
Meanwhile, researchers in Canada noted that associating blood groups A and AB appear to be associated with an increased risk of complications generated by COVID-19 when examining data from 95 patients. It turns out that those belonging to the two blood groups stayed longer in the intensive care unit (ICU). “We observed these damages in the lungs and kidneys and, in future studies, we want to investigate the effect of the blood group and covid-19 on other vital organs.” These data are of particular importance as we continue to go through the pandemic. We need more weapons to help increase the chances of a cure, ”says Mypinder S. Sekhon, a researcher at the University of British Columbia and one of the authors, in a statement.
Blood type and reactions to COVID-19
However, this is not the first time that researchers have linked COVID-19 to different blood types. In June, a team of researchers at the University Hospital in Oslo, Norway, found that people with type A blood were at risk of lung failure compared to other types, while those with type O blood appeared to be more protected from the problem.
In addition to this study, other parallel research conducted in China and the United States has already shown that people with type A blood are more susceptible to the disease than those with type O. In 2002 and 2003, during the SARS epidemic, scientists also found this relationship .
Fonte: Blood Advances
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