Amid fears of blood clots as a possible secondary effect of vaccination against the coronavirus, scientists of the Oxford University tried to calculate which are the real risks of developing a thrombosis due to the Pfizer, Moderna or AstraZeneca vaccines from available data. Scientists concluded that the chances of suffering a cerebral venous thrombosis (CVT) are 8 times higher after receiving the AstraZeneca vaccine and 10 times higher for those vaccinated with Pfizer or Moderna. Besides, Pfizer and Moderna vaccines cause 30 times more cases of portal vein thrombosis (PVT) than AstraZeneca’s.
The developers of the Russian vaccine Sputnik V asked health regulators all over the world to thoroughly examine the Oxford study on the correlation of rare cases of blood coagulation and the different types of vaccines against Covid-19, which shows that the risk of PVT seems to be 30 times higher with the mRNA (Pfizer and Moderna vaccines) than with AstraZeneca’s, and that the risk of CVT, one of the reasons why many regulators recommended to suspend the use of vaccines produced by AstraZeneca and Johnson & Johnson, seem to be very similar for the AstraZeneca vaccine and for the mRNA Pfizer and Moderna vaccines.