Blood clot is ‘very rare AstraZeneca side effect’

Written By: BBC

The EU’s medicines regulator says unusual blood clots should be listed as a very rare side effect of the AstraZeneca vaccine for Covid-19.

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After a study looking at 86 such cases in the EU, the European Medicines Agency (EMA) concluded the benefits of the vaccine outweighed the risk.

There was no definite causal link, and although most cases were in women under 60, they also occurred in men.

The EU has vaccinated more than 20 million people.

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“Our safety committee… has confirmed that the benefits of the AstraZeneca vaccine in preventing Covid-19 overall outweigh the risks of side effects,” she said.

Ms Cooke added: “This vaccine has proven to be highly effective – it prevents severe disease and hospitalisation, and it is saving lives.”

AstraZeneca has said its studies have found no causal link with blood clots.

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The EMA said that one plausible explanation was an “immune response, leading to a condition (heparin-induced thrombocytopenia, HIT) similar to one seen sometimes in patients treated with heparin”.

Heparin is a blood thinner used to prevent the formation of clots, and HIT is a potentially dangerous immune-driven adverse reaction to the drug.

EU health ministers will begin a meeting shortly to discuss the findings.

The EMA evaluates and supervises medicine use for all of the EU, including drug approval.

However, this does not mean there has been unity on tackling Covid-19.

In France, it is now recommended that AstraZeneca vaccinations should be given only to those aged 55 or over. In Germany it is over 60, plus high-priority groups. Norway, not an EU member, and Denmark have a full suspension.

Germany says its under-60s who have received an AstraZeneca first dose should now get a different vaccine for their second.

France, Finland and Norway could consider similar moves.

Studies are still being done on the effectiveness of mixed vaccines.

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