Vaccin AstraZeneca
© Inconnu
A study by Oxford University found the number of people who receive blood clots after getting vaccinated with a coronavirus vaccine are about the same for those who get Pfizer and Moderna vaccines as they are for the AstraZeneca vaccine that was produced with the university's help.

According to the study, 4 in 1 million people experience cerebral venous thrombosis after getting the Pfizer or Moderna vaccine, versus 5 in 1 million people for the AstraZeneca vaccine. The risk of getting CVT is much higher for those who get COVID-19 -- 39 in a million patients -- than it is for those who get vaccinated. AstraZeneca's vaccine use has been halted or limited in many countries on blood clot concerns.