EU agency: Rare clots possibly linked to AstraZeneca shot

A vaccine vial and a syringe on a table.
The AstraZeneca COVID-19 vaccine and a syringe are seen at the medical center on March 20 in Bridport, England.
Finnbarr Webster | Getty Images

The EU's drug regulator says it has found a "possible link" between the AstraZeneca coronavirus vaccine and a rare clotting disorder but said that the benefits of the shot still outweigh risks.

In a statement released Wednesday, the European Medicines Agency placed no new restrictions on using the vaccine in people 18 and over.

The EMA said most of the cases reported have occurred in women under 60 within two weeks of vaccination. The agency said based on the currently available evidence, it was not able to identify specific risk factors. Experts reviewed several dozen cases that came mainly from Europe and the United Kingdom, where around 25 million people have received the AstraZeneca vaccine.

"The reported cases of unusual blood clotting following vaccination with the AstraZeneca vaccine should be listed as possible side effects of the vaccine," said Emer Cooke, the agency's executive director.

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