A Certain Blood Type may be more Susceptible to Contracting COVID-19
In a recent study out of Southern University of Science and Technology in Shenzhen China, scientists have conducted a study that suggests that individuals with blood type A, have a higher probability than any other blood type, of contracting COVID-19. The study observed the blood types of almost 2,200 coronavirus patients, along with the blood types of 27,000 individuals without the viral disease. In the study, which has not yet been peer reviewed, scientists also noted that it seems that people with the blood type O have the lowest risk of contracting COVID-19.
In another study, this one out of the Department of Biomedical Informatics at Colombia University Irving Medical Center, the same focal point was addressed, of examining the relationship between the coronavirus and its effect on the different blood types. The team of scientists studied 1,559 individuals from the New York Presbyterian Hospital, who were tested for COVID-19. 682 tested positive, but what was particularly troubling for scientists, was that they discovered that individuals with blood type A were 33% more likely to have contracted COVID-19. This second study also concluded that people who have blood type O were the least likely to become infected.
BGR reported that a team of scientists, in Germany, extracted DNA from donated blood samples, from patients with and without the coronavirus. The scientists examined the 9 million letters of the genome in each patient, looking for genetic differences between severely sick and healthy people. “They found two spots in the genome, two loci, where the sick people shared the same genes as the healthy ones. In one of these locations, the gene that codifies the blood type of an individual, resides. That is how the researchers discovered that Type A blood appears to be a risk factor for COVID-19 complications”.
Scientists and researchers still do not know exactly why one blood type is more susceptible to the contagion, compared to other blood types, although there are some theories. According to Live Science “a person’s blood type indicates what kind of certain antigens carry over to the surface, of their blood cells. These antigens produce certain antibodies to fight off pathogens. In the ABO blood group system, type O contains the most antibodies, having both anti-A and anti-B”. This could help explain why the U.S. is the most infected country in the world, because 38% of the U.S. population contains blood type A.