European countries – including Denmark, Norway, Austria and Italy – have suspended use of the Oxford-AstraZeneca jab after reports of blood clots in vaccinated people.
The European Medicines Agency is now launching an investigation but at present there is no firm evidence to suggest the two are linked and incidents of clotting have not been reported in the UK.
Denmark and Norway have both suspended the rollout of the vaccine, while Italy and Austria have stopped using a certain batch as a precaution.
The Danish Health and Medicines Authority said the rollout out of the jab would be paused for at least 14 days while investigations are carried out. They did not say how many reports of blood clots there had been.
“It is currently not possible to conclude whether there is a link. We are acting early, it needs to be thoroughly investigated,”
Danish health minister Magnus Heunicke said on Twitter.
Søren Brostrøm, director of the National Board of Health, added: “It is important to emphasize that we have not opted out of the AstraZenecavaccine, but that we are putting it on hold.