BERLIN — A cascading number of European countries — including Germany, France, Italy and Spain — suspended use of AstraZeneca’s COVID-19 vaccine Monday over reports of dangerous blood clots in some recipients, though the company and international regulators say there is no evidence the shot is to blame.
AstraZeneca’s formula is one of three vaccines in use on the continent. But the escalating concern is another setback for the European Union’s vaccination drive, which has been plagued by shortages and other hurdles and is lagging well behind the campaigns in Britain and the U.S.
The EU’s drug regulatory agency called a meeting for Thursday to review experts’ findings on the AstraZeneca shot and decide whether action needs to be taken.
The furor comes as much of Europe is tightening restrictions on schools and businesses amid surging cases of COVID-19.
Germany’s health minister said the decision to suspend AstraZeneca shots was taken on the advice of the country’s vaccine regulator, the Paul Ehrlich Institute, which called for further investigation into seven cases of clots in the brains of people who had been vaccinated.
“Today’s decision is a purely precautionary measure,” Jens Spahn said.
French President Emmanuel Macron said his country will likewise stop dispensing the vaccine until at least Tuesday afternoon. Italy also announced a temporary ban, as did Spain, Portugal and Slovenia.
Other countries that have done so over the past few days include Denmark, which was the first, as well as Ireland, Thailand, the Netherlands, Norway, Iceland, Congo and Bulgaria. Canada and Britain are standing by the vaccine for now.
In the coming weeks, AstraZeneca is expected to apply for U.S. authorization of its vaccine. The U.S. now relies on Pfizer’s, Moderna’s and Johnson &Johnson’s shots.
AstraZeneca said there have been 37 reports of blood clots out of more than 17 million people vaccinated in the 27-country EU and Britain.
The drugmaker said there is no evidence the vaccine carries an increased risk of clots.
In fact, it said the incidence of clots is much lower than would be expected to occur naturally in a general population of this size and is similar to that of other licensed COVID-19 vaccines.
The World Health Organization and the EU’s European Medicines Agency have also said that the data does not suggest the vaccine caused the clots and that people should continue to be immunized.
“Many thousands of people develop blood clots annually in the EU for different reasons,” the European Medicines Agency said. The incidence in vaccinated people “seems not to be higher than that seen in the general population.”
The agency said that while the investigation is going on, “the benefits of the AstraZeneca vaccine in preventing COVID-19, with its associated risk of hospitalization and death, outweigh the risks of side effects.”
Blood clots can travel through the body and cause heart attacks, strokes and deadly blockages in the lungs.