[ad_1]
People with blood type (O) are, on average, 12% less likely to be infected with coronavirus, compared to other blood groups, while those with a negative blood type (O-), (A-) , (B-) or (AB-), have a 21% lower risk of getting stuck than those with a positive group, according to a new Canadian scientific study.
According to research, people with blood type (O) are 13% and 19% less likely to develop severe Covid-19 symptoms or die from the disease, respectively. Therefore, those who have a negative blood type (O-) seem to have the lowest risk of all.
According to the 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%, (Α-) 5%, (ΑΒ +) 4%, (Β-) 2% and (ΑΒ-) 1%. Therefore, those with a negative blood group constitute, in total, about 15%, while those with a group (O) 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) than for group. group (O). (A), percentage that increases to 12% on average compared to the other three groups in total. Those in group (B) have a 21% higher risk of severe Covid-19 than those in group (A).
The researchers, led by Dr. Joel Ray of the University of Toronto School of Medicine and St. Michael’s Hospital, published in the Annals of Internal Medicine, analyzed blood tests from 225,556 people with an average age of 54 years. years, as well as coronavirus test samples. 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. A Chinese study of 2,173 Covid-19 patients in three hospitals in Wuhan and the surrounding Hubei area found that the death rate from Covid-19 was highest in blood group (A) -41% of total deaths-, while the proportion of people with the same blood type in the Wuhan population 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 (O) 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- or AB +.
The Rhesus system 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. Those who have blood type (O) are considered “pandos” and their blood can be administered to any patient regardless of their group. In contrast, those with blood type (AB +) are “pandekhtos”, so they can get blood from all groups.
Source: ΑΠΕ – ΜΠΕ
