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Covid-19 and blood group: the transmission of the virus would have similarities with blood transfusions


A new scientific study, published in the journal Epidemics (Source 1), indicates that the most likely explanation is that Sars-CoV-2 infection behaves much like a blood transfusion.

“Using information from around the world, our latest data model indicates that Sars-CoV-2 infection behaves similarly to a blood transfusion and that infected patients are 2-3 times more likely to transmit the virus to someone for whom they are a compatible blood donor, commented Dr. Peter Ellis, author of the study and researcher at the School of Biosciences at the University of Kent (Canterbury, United Kingdom), in a press release (Source 2).

This explains why people with type O have a lower risk of infection. Just as they reject non-group O blood transfusions, they can reject virus particles from a patient with ‘non-O’ blood, thus escaping infection”, he continued. “However, individuals with type O blood are universal donors, who can donate blood to anyone. Likewise, once infected, they are also capable of infecting people of any other blood type. Conversely, those with type A blood are more likely to catch the virus and less likely to pass it on.”, added the researcher.

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For Dr. Ellis, these data could also partly explain the differences in the severity of the epidemic around the world : countries with a greater variety of blood groups would thus present natural barriers to the circulation of the virus. However, the scientist does not recommend carrying out a targeted vaccination of the most fragile blood groups or those most likely to transmit the virus.

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