Scientists claim to have discovered a “potential mechanism” that triggers rare blood clots in some people who receive the Oxford-AstraZeneca Covid vaccine.
Links between the vaccine and rare, sometimes fatal, blood clots have prompted some countries to restrict its use to older adults or favor alternative shots.
To be sure, medical experts have repeatedly said the benefits of the vaccine outweigh the risks associated with it, with one study concluding that Covid-19 poses a much bigger threat of blood clots than vaccination.