A large study in Denmark and Norway has found slightly increased rates of vein blood clots, including in the brain, among adults who had received their first dose of the Oxford-AstraZeneca COVID-19 vaccine, compared with expected rates in the general population. However, the study published in The BMJ on Wednesday, stresses that the risk of such adverse events is considered low. The researchers from University of Southern Denmark, and Norwegian Institute of Public Health, set out to compare rates of blood clots and related conditions after vaccination with the Oxford-AstraZeneca vaccine with those in the general populations of the two countries.
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The study published in The BMJ on Wednesday, stresses that the risk of such adverse events is considered low.
A large study in Denmark and Norway has found slightly increased rates of vein blood clots, including in the brain, among adults who had received their first dose of the Oxford-AstraZeneca COVID-19 vaccine, compared with expected rates in the general population.
However, the study published in The BMJ on Wednesday, stresses that the risk of such adverse events is considered low.
The researchers from University of Southern Denmark, and Norwegian Institute of Public Health, set out to compare rates of blood clots and related conditions after vaccination with the Oxford-AstraZeneca vaccine with those in the general populations of the two countries.
The team found no increase in the rate of arterial clots
New Delhi:
A large study in Denmark and Norway has found slightly increased rates of vein blood clots, including in the brain, among adults who had received their first dose of the Oxford-AstraZeneca COVID-19 vaccine, compared with expected rates in the general population.
However, the study published in The BMJ on Wednesday, stresses that the risk of such adverse events is considered low.
The researchers from University of Southern Denmark, and Norwegian Institute of Public Health, set out to compare rates of blood clots and related conditions after vaccination with the Oxford-AstraZeneca vaccine with those in the general populations of the two countries.
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The new Danish-Norwegian study is the first study to document possible adverse events in relation to the COVID-19 vaccine Vaxzevria? from AstraZeneca, in which all vaccine recipients have been followed systematically, as opposed to previous studies, which have relied primarily on reported adverse reactions.
The new study was a cooperation between Danish and Norwegian research institutions.
- In this study, we were able to identify all hospital contacts among vaccinated persons by utilising the unique Danish and Norwegian health registers. This ensures that we get a comprehensive of the rate of adverse reactions. Previous studies have been dependent on spontaneous reporting of adverse events in individual patients, which carries a risk of under-reporting, says Anton Pottegård, who is a professor at the University of Southern Denmark and co-author of the study.
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