UK authorizes Pfizer coronavirus vaccine for emergency use

British officials authorized a COVID-19 vaccine for emergency use on Wednesday, greenlighting the world’s first shot against the virus that’s backed by rigorous science and taking a major step toward eventually ending the pandemic.

The go-ahead for the vaccine developed by American drugmaker Pfizer and Germany's BioNTech comes as the virus surges again in the United States and Europe, putting pressure on hospitals and morgues in some places and forcing new rounds of restrictions that have devastated economies.

The Medicines and Healthcare Products Regulatory Agency, which licenses drugs in the U.K., recommended the vaccine could be used after it reviewed the results of clinical trials that showed the vaccine was 95% effective overall — and that it also offered significant protection for older people, among those most at risk of dying from the disease. But the vaccine remains experimental while final testing is done.

“Help is on its way,'' British Health Secretary Matt Hancock told the BBC, adding that the situation would start to improve in the spring.

“We now have a vaccine. We're the first country in the world to have one formally clinically authorized but, between now and then, we've got to hold on, we've got to hold our resolve," he said.

Other countries aren’t far behind: Regulators in the United States and the European Union also are vetting the Pfizer shot along with a similar vaccine made by competitor Moderna Inc. British regulators also are considering another shot made by AstraZeneca and Oxford University.

Hancock said Britain expects to begin receiving the first shipment of 800,000 doses “within days,'' and people will begin receiving shots as soon as the National Health Service gets the vaccine.

Doses everywhere are scarce, and initial...