People sit in the sunshine as others ski by on the waterfront ice of Helsinki
(Picture: AP)Denmark, Sweden and Norway have said they need more time to decide whether to use AstraZeneca's Covid-19vaccine - as Finland joined them in putting the shots on hold.
"We need time to get to the bottom of this," Soren Brostrom, head of the Danish Health Authority, told reporters on Friday.
Several European countries last week suspended use of the vaccine following reports of rare instances of blood clots in some people who had been vaccinated.
On Friday nearly a dozen of them resumed inoculations after the European Medicines Agency ruled they were “safe and effective”, saying the benefits outweighed any risks.
"This does not change the fact that, on the basis of a precautionary principle, we are continuing our suspension, because we need to understand this better, so that we can say with certainty that we recommend this vaccine," Mr Brostrom said.
Meanwhile Finland, which had not previously suspended the vaccine, announced it would halt the use of the AstraZeneca shot while investigating two suspected cases of blood clots.
"After doing the investigation we can better inform people about the risk associated with the vaccine if there is one," said Taneli Puumalainen, chief physician at the Finnish Institute for Health and Welfare.
Health authorities in all four Nordic countries said they planned to decide on the future use of the AstraZeneca vaccine next week.
Norway has so far reported five cases in which recipients of the vaccine were later admitted to hospital with a combination of blood clots, bleedings and low platelets, one of whom has died.
A sixth person, who also got the vaccine, has died from brain a haemorrhage in combination with a low count of platelets.
"These cases are rare, but very serious. We can not rule out that these cases may be linked to the AstraZeneca vaccine," the Norwegian Medicines Agency said.
Sweden is also looking into isolated cases of blood clots and coagulatory issues among people who took the vaccine, including two deaths, though authorities have said any possible link to the inoculations remains uncertain.
"We know already that we have quite a few people that have begun to be hesitant about the vaccine," Chief Epidemiologist Anders Tegnell, the architect of Sweden's no-lockdown pandemic strategy, told public service broadcaster SVT.
"That means it is hugely important that we are able to issue clear communications about how and why we continue to use (the AstraZeneca vaccine)."
Sweden, Finland and Norway have seen a rapid rise in Covid-19 cases in recent weeks. Denmark has seen numbers fall and is gradually reopening society.
AstraZeneca has said a review of safety data of more than 17 million people vaccinated in the United Kingdom and European Union with its vaccine had shown no evidence of an increased risk of blood clots.
