XPost: misc.news.internet.discuss   
   From: here@is.invalid   
      
   Scientists Figured Out the Problem With Johnson & Johnson's COVID   
   Vaccine   
      
   Rare but dangerous blood clotting associated with that vaccine as well   
   as AstraZeneca's had a genetic cause, according to a new paper.   
      
   In 2021, just months after the first COVID vaccines debuted, concern   
   was growing about an exceedingly rare but sometimes deadly outcome of   
   certain shots. Two related vaccines--one from AstraZeneca and the   
   other from Johnson & Johnson--were linked to dangerous blood clotting.   
      
   Out of almost 19 million doses of Johnson & Johnson's version given in   
   the United States during the first two years of the pandemic, at least   
   60 such cases were identified. Nine of them were fatal. In the United   
   Kingdom, where almost 50 million doses of the AstraZeneca shot were   
   given, 455 cases occurred; 81 people died. In Germany, at least 71   
   cases were identified, also linked to AstraZeneca. By late spring, use   
   of both the AstraZeneca and the Johnson & Johnson vaccine was paused,   
   and ultimately both were pulled from the market. But the mystery   
   surrounding the rare blood clotting caused by these vaccines lingered.   
      
   Now researchers believe they have cracked the case. They have hard   
   evidence for how the blood clotting happened, and they believe that   
   their findings could help make similar vaccines even safer.   
   Understanding the blood-clotting problem is important, they say,   
   because vaccines of this type could be essential in protecting people   
   during future pandemics.   
      
   https://www.theatlantic.com/science/2026/02/covid-vaccines-blood   
   clotting-answer/685966/   
      
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