London, Thanasis Gavos
The reaction of a protein found in the blood is believed to be the reason why in rare cases the administration of the AstraZeneca vaccine, but also of Johnson & Johnson, can cause thrombosis.
Scientists from the Universities of Arizona and Cardiff, who worked with AstraZeneca, have found that the inactivated adenovirus used by the vaccine to carry coronavirus genetic material to cells attracts the protein known as “platelets.”
This triggers a chain reaction that culminates in the rare side effect of thrombosis.
According to data collected by May, there were 242 cases of thrombosis in the United Kingdom in people who had been vaccinated over a total of 28.5 million doses. 49 of these cases had resulted in the death of the patient.
The British authorities then changed the vaccination schedule, deciding to give a vaccine other than AstraZeneca to those under 40 years of age.
Professor Alan Parker of Cardiff University, one of the researchers and authors of the scientific report published in the journal Science Advances, said that cases of thrombosis due to vaccination were “extremely rare”.
He explained that the adenovirus is charged with a strong negative electrical charge, while the protein it attracts is positive. “What we found is what triggers (thrombosis), but there are many steps that need to be taken later (to address the problem),” added the British scientist.
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