The risk of blood clots among those who’ve been diagnosed with Covid-19 is higher than among those who’ve received vaccines against the disease, according to a new study from the University of Oxford.
Covid patients saw a clot risk of 39 in a million. That compared with four in a million in mRNA vaccines like those developed by Pfizer Inc. and BioNTech SE or Moderna Inc., and five in a million people after AstraZeneca Plc’s vaccine. Though the analyses for the three vaccines are based on different data sets, making comparisons difficult, the study suggests that the risk of a clot among those with the disease is about eight to 10 times higher than after vaccination.
