A senior official of the European Medicines Agency (EMA) said in an interview on Tuesday that there is a link between AstraZeneca’s COVID-19 vaccine and a very rare blood clot in the brain, but the possible cause is still unknown.
“I think we can say that now, it is obviously related to the vaccine. However, we still don̵
Cavalieri added that although it is unlikely that regulators should give instructions this week on the age of individuals who shot at AstraZeneca, EMA will indicate that there is a connection.
He did not provide evidence to support his comments.
AstraZeneca did not immediately comment. It said that previous studies did not find a higher risk of blood clots due to the use of vaccines.
The regulator has always stated that the benefits outweigh the risks because it investigated an extremely rare brain coagulation disease called cerebral venous sinus thrombosis (CVST) among 44 cases of 9.2 million people who received AstraZeneca vaccine in the European Economic Area. Reports.
The World Health Organization also supports the vaccine.
EMA said last week that its review has not found any specific risk factors for these very rare events, such as age, gender or previous history of coagulopathy. The agency said that the causal relationship with the vaccine has not been confirmed, but it is possible, and further analysis is still going on.
A large percentage of the reported cases affected young and middle-aged women, but this did not allow EMA to conclude that this population is particularly vulnerable to AstraZeneca shootings.
EMA is expected to provide the latest survey information on Wednesday.
While the investigation continues, some countries including France, Germany and the Netherlands have suspended the use of the vaccine among young people.
Scientists are exploring several possibilities that may explain the extremely rare cerebral blood clots that occur in individuals within days and weeks of receiving the AstraZeneca vaccine.
European researchers have proposed a theory that, in rare cases, vaccines can trigger unusual antibodies. Others are trying to understand whether these cases are related to birth control pills.
But many scientists say that there is no definitive evidence, nor is it clear whether or why AstraZeneca’s vaccine causes problems that other vaccines targeting similar parts of the coronavirus do not.
Armando Genazzani, a member of the EMA’s Committee on Medicinal Products for Human Use (CHMP), told the Daily Mail in another interview that it is “reasonable” for the blood clot to be related to the AstraZeneca vaccine.
Reporting by Giulia Segreti; Editing by Giles Elgood