Prognosis

Clotting From Covid Shots Is Rare But Can Be ‘Devastating’

  • About 1 in 50,000 people under age 50 faces risk of syndrome
  • Study may help governments identify and manage cases
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Researchers say they’re making progress in understanding a clotting disorder linked to Covid-19 vaccines that they describe as very rare but potentially “devastating.”

The blood-clotting syndrome affected about 1 in 50,000 people under the age of 50 who received the vaccine developed by AstraZeneca Plc and the University of Oxford, according to a study published in the New England Journal of Medicine. Almost a quarter of those patients who definitely or probably had the condition died.