AMSTERDAM (AP) — The European Union drug regulator recommended the BioNTech-Pfizer coronavirus vaccine for use Monday, raising hopes that the 27 nations in the bloc can begin administering the first shots to their citizens shortly after Christmas.

The move by the European Medicines Agency comes weeks after the same vaccine was authorized in Britain and the United States, prompting pressure from EU governments for the agency to speed up its process as virus cases surged again across the continent.

Adding to an already grisly toll were concerns over a newly identified strain that appears to spread more easily. But experts expressed confidence that the new vaccine would still be effective against it.

“This is really a historic scientific achievement," Emer Cooke, the head of the drug regulator, said after a closed-door meeting in which experts unanimously recommended the shot for people over 16. “It is a significant step forward in our fight against the pandemic.”

The conditional marketing authorization, as its known, needs to be rubber-stamped by the EU's executive branch, a move its chief said is likely to happen Monday evening.

European Commission President Ursula von der Leyen tweeted that the recommendation was “a decisive moment in our efforts to deliver safe & effective vaccines to Europeans!”

“Now we will act fast,” she said.

Authorities in Germany and several other European countries have said they hope to begin giving the vaccine to people on Dec. 27.

“Today is a particularly personal and emotional day for us at BioNTech,” said Ugur Sahin, the Germany-based company’s chief executive and co-founder. “Being in the heart of the EU, we are thrilled to be one step closer to potentially delivering the first vaccine in Europe to help combat this devastating pandemic.”

The European regulator came under heavy pressure last week from countries calling for the vaccine to be approved as quickly as possible. EMA originally set Dec. 29 as the date for evaluating the vaccine, but moved up the meeting to Monday after calls from the German government and others for the agency to move more quickly.

Harald Enzmann, the head of EMA's expert committee, dismissed any suggestion that political influence had affected the decision.

“The focus was exclusively on the science," he told reporters. “That was a scientific assessment, full stop.”

The Amsterdam-based EMA is responsible for approving all new drugs and vaccines across the 27 EU member states, Iceland, Liechtenstein and Norway. It is roughly equivalent to the U.S. Food and Drug Administration.

The vaccine has already been given some form of regulatory authorization in at least 15 countries.

Britain, Canada and the U.S. authorized the vaccine to be used according to emergency provisions, meaning the shot is an unlicensed product whose temporary use is justified by the pandemic that has killed almost 1.7 million people worldwide, according to a tally by Johns Hopkins University.

Switzerland became the first country Saturday to authorize the vaccine according to the normal licensing procedure. EMA's approval also followed the regular process, only on an accelerated schedule and under the condition that the pharmaceutical companies submit follow-up data on their vaccine for the next year.

While many have clamored for the vaccine's authorization, there have also been concerns, in Europe and elsewhere, about the speed with which the shot was developed. Normally, vaccines takes years to develop and approve, not months.

In a statement last week that appeared to address those concerns, the agency stressed that the vaccine would only be approved after a scientific assessment showed its overall benefits outweighed the risks.

Scientists are still waiting for more long-term follow-up data to see how long immunity from the vaccine lasts and if there are any rare or serious side effects. Final testing of the vaccine is still ongoing, and more information on whether the shot works in children is needed. EMA experts also said that data on pregnant women is limited, and physicians should decide on a case-by-case basis.

The vaccine is not made with the coronavirus itself, meaning there’s no chance anyone could catch it from the shots. Instead, the vaccine contains a piece of genetic code that trains the immune system to recognize the spiked protein on the surface of the virus.

On the day Britain began its vaccination campaign, authorities warned people with severe allergies not to get the shot after two people suffered serious allergic reactions; it’s unclear if the reactions were caused by the vaccine.

The U.S. Centers for Disease Control and Prevention said that as of Friday there had seen six cases of severe allergic reaction out of more than a quarter-million shots of the BioNTech-Pfizer vaccine given, including in one person with a history of vaccination reactions.

EMA chief Cooke downplayed concerns that the vaccine might be ineffective against a new strain of the coronavirus detected in Britain

“At the moment, we can say that there is no evidence to suggest that the vaccine will not work against the new variant of the coronavirus,” she said.

But she added that protective measures such as wearing masks, washing hands and social distancing would likely be needed for some time.

“Vaccines alone will not be the silver bullet that will allow us to return to normal life,” said Cooke. “But the authorization of this first vaccine is definitely a major step in the right direction and an indication that 2021 can be brighter than 2020.”

As criticism swirled that the 27-nation EU has taken too long to endorse the new shot, Luxembourg Prime Minister Xavier Bettel thanked the experts at the EMA “for their tireless and rigorous work in assessing the safety of this vaccine!”

The EU has ordered 300 million doses of the BioNTech-Pfizer vaccine; two are needed for each person, meaning other shots will be required to immunize all of the bloc’s nearly 450 million inhabitants.

The EMA plans to hold a meeting on Jan. 6 to decide if another vaccine made by Moderna should be licensed. It has reviews ongoing for a shot developed by Oxford University and AstraZeneca and another from Janssen, but neither of those have made a formal request for the EMA to approve their vaccine.

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Jordans reported from Berlin. Associated Press writers Maria Cheng in Toronto and Lorne Cook in Brussels contributed to this report.

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Follow AP coverage of the virus outbreak at https://apnews.com/VirusOutbreak and https://apnews.com/UnderstandingtheOutbreak.