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People with blood type They have -on average- 12% less probability become infected with coronavirus, relative to other blood groups. Also, those with a negative blood group (O-, A-, B- or AB-) have a 21% lower risk of contracting the coronavirus than those with a positive blood group, according to a new Canadian scientific study.
Also, people with blood type C are 13% and 19% less likely to develop it. corresponding severe symptoms of Covid-19 or dying due to illness. Therefore, those with an O- negative blood type appear to have the lowest risk of all.
In accordance with National Blood Donation Center, the most common blood group in Greece is O + and the rarest is AB-. It is estimated that in our country, according to Wikipedia, the distribution of people in blood groups is approximately the following: O + 37%, A + 33%, B + 11%, O- 7%, A- 5%, AB + 4 %, B-2% and AB-1%. Thus, those with a negative blood type constitute, in total, about 15%, while those with a group C represent 44%.
The Canadian study also shows that the risk of SARS-CoV-2 infection is 15% higher for group AB than for group A and 5% lower for group O in relation to A., a percentage that increases to 12% on average compared to the other three groups as a whole. Those who have group B, face 21% higher risk of severe Covid-19 compared to those in group A.
The researchers, led by him Dr. Joel Ray from the Department of Medicine of the University and St. Michael’s Hospital in Toronto, who made the relevant publication in the American medical journal “Annals of Internal Medicine”, analyzed the data from the blood tests of 225,556 people with an average age of 54, as well as test samples for coronavirus. Of these, 44% had group O, 36% group A, 15% B and 5% AB.
The Canadian study’s findings are broadly in line with those of an older Chinese woman who was the first to discover that not all blood types have the same risk of coronavirus infection. The Chinese study in 2,173 patients with Covid-19 in three of its hospitals Wuhan and the surrounding Hubei area found that the death rate from Covid-19 was highest in blood type A (41% of all deaths), while the proportion of people with the same blood type in the population of Wuhan did not exceed 34%. On the other hand, the death rate of people with Covid-19 in group O was lower (25%) compared to the percentage of group C in the general population (32%).
Each person belongs to one of the eight blood groups. These groups are subcategories of the four main groups of the ABO system (A, B, AB or O). The rhesus (Rh) system further separates these four groups into Rh positive (+) or Rh negative (-), creating eight basic blood types or groups: O-, O +, B-, B +, A-, A +, AB- ή AB +.
The system Rhesus It was discovered in 1939 and is based on the presence of antigens, mainly the D antigen. Antigens are molecules that bind to an antibody. A person may or may not have Rh factor (D antigen) on the surface of their red blood cells, which is why they are classified as rhesus positive (Rh +) or negative (Rh-).
Not all blood types are compatible with each other. This is due to the different antibodies that each person has depending on their blood type. People with blood group C are considered “pandemics” and their blood can be administered to any patient regardless of their group. In contrast, those with blood group AB + are “pandekhtos”, so they can get blood from all groups.
Source: ΑΠΕ-ΜΠΕ
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