While some infected people struggle with the severe course and its consequences, others do not even notice that they are carriers of the virus. But what could be the reason for this? Scientists from the Austrian study have now confirmed the supposition that your blood type may be related to the level of risk of infection.
Several studies have previously shown that there is a link between coronary diseases and patients’ blood types. The scientists from Graz now wanted to know exactly why this was happening.
People with blood group 0 are less likely to contract the coronavirus
Dr. Eva Maria Matzhold conducts research at the Medical University of Graz with the respected transfusion specialist Dr. Thomas Wagner. In a still unpublished study, they want to find out what the connection between the blood type and the infection is. To this end, they studied 399 people who were positive for SARS-CoV-2 who were treated in the hospital. Now, scientists have revealed the first exciting results before. One thing is for sure: people with blood group 0 are obviously less likely to contract the coronavirus. According to Matzhold, this may be due to the presence of antibodies in the AB0 system.
“The results of our research show that people with blood type O have a statistically significantly lower chance of developing COVID-19 than people with other ABO phenotypes (blood group A, B or AB)”
Dr. Maria Matzhold
In the case of AB0 blood groups, we distinguish A, B, AB and 0. The determining factor is the structure of the blood cell surface, which is made up of various carbohydrates and proteins in the envelope, the so-called Membrane. These carbohydrates and proteins are also called antigens. While all other blood groups have antigens on the membranes of their blood cells, they cannot be found in blood group 0. According to scientists, this could be a decisive difference. It is already known that “bacteria or viruses, […] thus selectively bind to blood group structures and influence the colonization of the affected tissue or the absorption into cells [können]”so Matzhold.
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The results have nothing to do with the severity of the course
Anyone who thinks that with blood type 0, they are armed with everything and no longer need to defend themselves is wrong. In their first press release about their research, the research team explained: the new findings about blood group 0 have nothing to do with the course of the disease. Even such a person can still get sick and even undergo a difficult course. Only the probability is lower. The research would now continue and the exact causes would be investigated in more detail, but the purpose is not to be clear.
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