There is a link between AstraZeneca’s COVID-19 vaccine and very rare blood clots in the brain but the possible causes are still unknown, a senior official for the European Medicines Agency (EMA) said in an interview published on Tuesday.
However, the EMA later said in a statement that its review of the vaccine was ongoing and it expected to announce its findings on Wednesday or Thursday. An AstraZeneca spokesman declined to comment on the matter.
“In my opinion, we can now say it, it is clear that there is an association (of the brain blood clots) with the vaccine. However, we still do not know what causes this reaction,” Marco Cavaleri, chair of the vaccine evaulation team at the EMA, told Italian daily Il Messagero.
Cavaleri provided no evidence to support his comment.
The EMA has repeatedly said the benefits of the AstraZeneca shot outweigh the risks as it investigates 44 reports of an extremely rare brain clotting ailment known as cerebral venous sinus thrombosis (CVST) out of 9.2 million people in the European Economic Area who have received the vaccine.
The World Health Organization has also backed the vaccine.
