Compared to current COVID-19 vaccines, the risk of developing cerebral venous thrombosis is between 8 to 10 times higher after contracting the infection, according to the study.
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The risk of rare blood clotting known as cerebral venous thrombosis (CVT) after COVID-19[female[feminine the infection is several times higher than the post-vaccination, according to a study unveiled Thursday.
The study by researchers at the University of Oxford in the UK counted the number of CVT cases diagnosed within two weeks of being diagnosed with COVID-19[female[feminine , or after the first dose of a vaccine.
They compared them to the calculated incidences of CVT after influenza and to the background level in the general population.
The team found that CVT is more common after COVID-19[female[feminine than in any of the comparison groups, with 30 percent of these cases occurring in those under 30.
With respect to the current COVID-19[female[feminine vaccines, this risk is between 8 and 10 times higher, and compared to baseline, about 100 times higher, they said.
“There are concerns about possible associations between vaccines and CVT, leading governments and regulators to restrict the use of certain vaccines,” said Paul Harrison, head of the Translational Neurobiology group at the University of Montreal. ‘Oxford.
“Yet a key question remained unknown: what is the risk of CVT following a diagnosis of COVID-19[female[feminine ? “Said Harrison.
The researchers noted that COVID-19[female[feminine dramatically increases the risk of CVT, adding to the list of blood clotting problems that this infection causes.
the COVID-19[female[feminine the risk is higher than that seen with current vaccines, even for those under 30, they said.
This is something that should be taken into account when considering the balance between the risks and benefits of vaccination, according to the researchers.
The researchers noted that it is important that these data be interpreted with caution.
Signals that COVID-19[female[feminine is linked to CVT, as well as portal vein thrombosis – a clotting disorder of the liver – is clear, and we need to take note of it, they said.
An important factor that requires further research is whether COVID-19[female[feminine and vaccines lead to CVT by the same or different mechanisms, according to the researchers.
There may also be CVT underreporting or coding error in medical records, and therefore uncertainty as to the accuracy of the results, they added.