Expert says he found why some COVID-19 vaccines trigger clot issues
May 14, 2021 at 11:19
Scientists world-wide are racing to understand why Covid-19 vaccines from AstraZeneca PLC and Johnson & Johnson are causing rare but potentially deadly blood clots.
Determining the connection would help patients, doctors and health agencies better assess any risks posed by the vaccines and safely calibrate their use.
In recent weeks, the U.S., the Canadian province of Ontario and several European countries including Norway and Denmark either paused or completely halted rollouts involving these vaccines.
FULLY VACCINATED PEOPLE CAN DITCH MASKS INDOORS, PHYSICAL DISTANCING: CDCIn Germany, one researcher thinks he has found what is triggering the clots.
According to Prof. Greinacher, that reaction could be tied to stray proteins and a preservative he has found in the AstraZeneca vaccine.
Prof. Greinacher and his team has just begun examining Johnson & Johnson’s vaccine but has identified more than 1,000 proteins in AstraZeneca’s vaccine derived from human cells, as well as a preservative known as ethylenediaminetetraacetic acid, or EDTA.
Yet the cause was unclear.
"[Prof. Greinacher’s] hypothesis could be right, but it could also be wrong," Prof. Kelton said.
Prof. Greinacher is working to confirm his theory, hoping to get cooperation from vaccine makers.
His team has tested AstraZeneca vaccines and has just received doses from Johnson & Johnson.
Greifswald University is now negotiating with the drugmakers about greater access to their vaccine-making processes.
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