The research was conducted by the University of Oxford.
It's claimed the risk of blood clots for someone with Covid-19 is almost nine times higher than in people who've had their first vaccine dose.
Researchers from the University of Oxford looked at more than 29 million people in England who'd been jabbed.
They also identified a link between the Pfizer vaccine and a higher probability of having a stroke - but those with Covid-19 were more than ten times more at risk.
NEW: An Oxford study has found that the risk of blood clots is far higher following infection from COVID-19 than after taking a vaccine dose.
— University of Oxford (@UniofOxford) August 27, 2021
Researchers analysed data from over 29 million vaccinated people.
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