Blood Expert Says He Found Why Some Covid-19 Vaccines Trigger Rare Clots - (The Wall Street Journal via NewsPoints Desk)

  • Researcher Andreas Greinacher of the University of Greifswald in Germany believes viral vector vaccines, which use modified adenoviruses, to convey genetic material into vaccine recipients to fight COVID-19, could cause an autoimmune response that leads to blood clots, reported The Wall Street Journal. 

  • According to Greinacher, that reaction could be tied to stray proteins and a preservative he has found in the AstraZeneca vaccine.

  • He and his team have just begun examining Johnson & Johnson's vaccine, but has identified more than 1000 proteins in AstraZeneca's vaccine derived from human cells, as well as a preservative known as ethylenediaminetetraacetic acid (EDTA).

  • Their hypothesis is that EDTA, which is common to drugs and other products, helps those proteins stray into the bloodstream, where they bind to a blood component called platelet factor 4 (PF4), forming complexes that activate the production of antibodies.

  • The inflammation caused by the vaccines, combined with the PF4 complexes, could trick the immune system into believing the body had been infected by bacteria, triggering a defense mechanism that then runs out of control and causes clotting and bleeding.

  • 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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