According to studies, People with O blood group may have a lower risk of infection from the SARS-CoV-2 virus, which causes COVID-19 and reduces the serious consequences, including organ problems.
The studies, published in the journal Blood Advances on Wednesday, add evidence that there may be an association between blood type and vulnerability to COVID-19.
In the study, the researchers compared Danish health registry data where 473,000 individuals tested for COVID-19 with data from a control group of more than 2.2 million people in the general population.
In COVID-19 positive, they found fewer people with blood group O and those with group A, B, and AB.
The study suggests that people with blood types A, B, or AB are more likely to be infected with COVID-19 than people with type O blood.
“It is very important to consider the proper control group because blood type prevalence may vary considerably in different ethnic groups and different countries,” said study author Torben Barrington, from the University of Southern Denmark.