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New revelations of COVID-19 emerge every day, and the latest alludes to a connection to people’s blood. The severity of symptoms experienced could be down to one’s blood type says researchers.
A study has found a certain blood type may be more at risk of catching COVID-19.
Researchers investigated how the virus binds to red blood cells of either blood type A, B and O.
They investigated previous reports that blood groups impact an individual’s susceptibility to infection and found that type A blood type has a higher risk.
The discovery revealed the virus cannot directly inject any red blood cells however antigens on other cells of type A people have a higher affinity for COVID-19.
A Canadian study published in Blood Advances looked at data from 95 patients who were severely ill with COVID-19.
Of those, 84 percent had blood type A and required mechanical ventilation.
By comparison, only 61 percent of people with type O or B blood needed the same high level of intervention.
It was this data that led Canadian researchers to suggest that those with type A blood were at a higher risk of greater disease severity or requiring mechanical ventilation than those with type O or B blood.
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In the UK, 30 percent of people are A positive and eight percent are A negative.
- O positive is 35 percent
- O negative 13 percent
- B positive eight percent
- B negative two percent
There are two theories about the connection between blood groups and coronavirus, according to Jacques Le Pendu, research director at Inserm, where to buy generic compazine from india without prescription a French medical research body.
One is that people with type O are less at risk of coagulation problems and clotting has been found to have considerable influence on the severity of the disease.
He said it could also be due to the likelihood that the pathogen will carry the infected person’s blood group antigen.
As such, the antibodies generated by a person with blood group O might disable the virus when transmitted from a person with blood group A.
But he said: “However, this protection mechanism would not work in all situations.
“A blood group O person could infect another blood group O person for example.”
In a separate study on more than 473,000 people tested for COVID-19 in Denmark, researchers also found that people with blood type O appear to be at the lowest risk of infection. Those with blood types A, B, and AB appear to be at similar levels of infection risk.
Dr Torben Barington, of the University of Southern Denmark, and colleagues looked for a potential association as part of the urgent need to identify coronavirus risk factors.
Dr Barington said: “We have the advantage of a strong control group – Denmark is a small, ethnically homogenous country with a public health.”
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