Higher risk of brain clots from Covid-19 compared with vaccines: study
A woman receives an Oxford-AstraZeneca coronavirus disease (Covid-19) vaccine at a Covid-19 vaccination centre at Cwmbran Stadium in Cwmbran, South Wales, Britain February 17, 2021. Photo: Reuters Reuters Reuters
There is a much higher risk of brain blood clots from Covid-19 infection than there is from vaccines against the disease, British researchers said on Thursday, after the rollout of inoculations was disrupted by reports of rare clots.
AstraZeneca (AZN.L) and Johnson & Johnson (JNJ.N) have both seen very rare reports of cerebral venous sinus thrombosis (CVST) linked to their vaccines. On Wednesday, the United States paused vaccinations using J&J s shot while a link with clots was investigated, with Denmark ditching AstraZeneca s shot over the issue.
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There is a much higher risk of brain blood clots from COVID-19 infection than there is from vaccines against the disease, British researchers said on Thursday, after the rollout of inoculations was disrupted by reports of rare clots.
AstraZeneca and Johnson & Johnson (J&J) have both seen very rare reports of cerebral venous sinus thrombosis (CVST) linked to their vaccines.
On Wednesday, the United States paused vaccinations using J&J’s shot while a potential link with clots was investigated, with Denmark ditching AstraZeneca’s shot over the issue.
British and European regulators have stressed that the benefits of vaccination outweigh the risks.
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The study was based on a U.S. health database, and so did not accrue new data on the risk of clots from AstraZeneca’s vaccine directly, as the shot is not being rolled out there.
Taquet said that the mortality rate from CVST was around 20% whether it occurred after COVID-19 infection or a vaccine, indicating the clots were the main risk factor.
Regulators had also observed low platelet levels in reports of vaccine side effects, but the researchers said data was limited on whether that was also the case in those reporting CVST after infection.
The researchers highlighted that COVID-19 was associated with more common clotting disorders than CVST, such as strokes, and that recent debate around vaccines had lost sight of how bad the disease itself could be.
LONDON (REUTERS) - There is a much higher risk of brain blood clots from Covid-19 infection than there is from vaccines against the disease, British researchers said on Thursday (April 15), after the roll-out of inoculations was disrupted by reports of rare clots.
AstraZeneca and Johnson & Johnson have both seen very rare reports of cerebral venous sinus thrombosis (CVST) linked to their vaccines.
On Wednesday, the United States paused vaccinations using J&J s shot while a link with clots was investigated, with Denmark ditching AstraZeneca s shot over the issue. British and European regulators have stressed that the benefits of vaccination outweigh the risks.