While creating the test, "we started looking at different parts of the virus and realized that the receptor binding domain … it looks very similar to an ancient group of proteins called galectins," Stowell said. Stowell said that he and his colleagues were curious about the link between blood type and COVID-19, but that they actually struck inspiration for their new study while developing a diagnostic test for the disease. This new study hints at a possible explanation for why SARS-CoV-2 may infect blood type A individuals more easily than type O - though it doesn't explain why type B is also linked to more infections than type O, he noted. "Several hypotheses have been proposed for these associations, but we still need to learn what the mechanisms actually are," Barington told Live Science in an email. People with type A blood may also be more likely to develop severe symptoms and respiratory failure when they do contract the virus, some studies found. Torben Barington, a clinical immunologist at Odense University Hospital and the University of Southern Denmark, who was not involved in the study. "Many studies have found associations between blood groups and propensity for SARS-CoV-2 infections," in particular, showing that people with type O blood have a lower risk of catching COVID-19, compared with non-O blood types, said Dr.
Since the early days of the pandemic, several studies of coronavirus patients have uncovered trends in what blood types seem to become infected most often, Live Science previously reported.
Duplication for commercial use must be authorized in writing by ADAM Health Solutions.In other words, the data provide the first physical link between the coronavirus and type A blood, but more research is needed to confirm that this difference affects the odds of actual infection. Links to other sites are provided for information only - they do not constitute endorsements of those other sites. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions. The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. This site complies with the HONcode standard for trustworthy health information: verify here. Learn more about A.D.A.M.'s editorial policy editorial process and privacy policy. is among the first to achieve this important distinction for online health information and services. follows rigorous standards of quality and accountability. is accredited by URAC, for Health Content Provider (URAC's accreditation program is an independent audit to verify that A.D.A.M. Usually, a reaction occurs because of a clerical error causing someone to receive incompatible blood.Ī.D.A.M., Inc. Before anyone receives blood, both the blood and the person receiving it are tested carefully to avoid a reaction. But people with type O can only receive type O blood.īoth blood and plasma transfusions must be matched to avoid an immune reaction. People with type O blood are called universal donors. This is why type O blood cells can be given to people of any blood type. Type O blood does not cause an immune response when it is given to people with type A, type B, or type AB blood. People with type AB blood will not react against type A, type B, type AB, or type O blood.People with type O blood will react against type A, type B, or type AB blood.People with type B blood will react against type A or type AB blood.People with type A blood will react against type B or type AB blood.The blood types must be compatible to avoid an ABO incompatibility reaction. This is important when someone needs to receive blood (transfusion) or have an organ transplant.
People who have one blood type may form proteins ( antibodies) that cause their immune system to react against one or more of the other blood types.īeing exposed to another type of blood can cause a reaction.
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