Los Angeles | German researchers believed they have found the cause of the rare but serious blood clotting events among some people who received COVID-19 vaccines made by AstraZeneca and Johnson & Johnson.
The researchers, in a study not yet reviewed by experts, said on Wednesday that COVID-19 vaccines that employed adenovirus vectors – cold viruses used to deliver vaccine material – sent some of their payload into the nucleus of cells, where some of the instructions for making coronavirus proteins could be misread.
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