European Scientists Zero In On AstraZeneca Blood Clot Link

Two teams of European scientists, working independently, say they believe they’ve identified the cause of a rare blood clotting condition that has occurred in some people after receiving the AstraZeneca COVID-19 vaccine.

If correct, their research could mean any blood clots that occur could be easily treated.

There were reports earlier this month of roughly 30 blood clots occurring after vaccination, a few of them fatal. This led more than a dozen European countries to suspend their use of the AstraZeneca vaccine.

Most countries resumed using it, however, after the European Medicines Agency conducted an investigation and declared on Thursday that the AstraZeneca vaccine is safe and effective. The EMA said the benefits of the vaccine far outweigh the potential risks — and pointed out that the rate of post-vaccine blood clots was actually lower than the expected rate in the general population.

Now, a group of German researchers, led by professor Andreas Greinacher at the University of Greifswald, said on Friday in a statement that they believe the AstraZeneca vaccine, in some cases, prompts overactivation of platelets in the blood, which can then cause potentially deadly clots. They said it’s similar to what happens with a condition called heparin-induced thrombocytopenia.


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