U.K. health authorities are rolling out the first doses of a widely tested and independently reviewed coronavirus vaccine, starting a global immunization program that is expected to gain momentum as more serums win approval.

The first shot will come Tuesday at one of a network of hospital hubs around the country where the initial phase of the U.K. program will be rolled out on what has been dubbed “V-Day.”

Public health officials are asking the public to be patient because only those who are most at risk from coronavirus will be vaccinated in the early stages. Medical staff will contact patients to arrange appointments, and most will have to wait until next year before there is enough vaccine to expand the program.

“I think there’s every chance that we will look back on ... (Tuesday) as marking a decisive turning point in the battle against coronavirus,” said Simon Stevens, the CEO of England’s National Health Service.

The first 800,000 doses are going to people over 80 who are either hospitalized or already have outpatient appointments scheduled, along with nursing home workers. Others will have to wait their turn.

Among those older Britons scheduled to get vaccinated is Hari Shukla of Newcastle.

“When I received the telephone call, I was very excited I got the opportunity of joining in and taking part in that,″ he said. “So we are very very pleased and happy and excited as well.″

Buckingham Palace refused to comment on reports that Queen Elizabeth II, 94, and her 99-year-old husband, Prince Philip, would be vaccinated as a public example of its safety.

“Our goal is totally to protect every member of the population, Her Majesty, of course, as well,” Dr. June Raine, chief executive of Britain’s Medicines and Healthcare products Regulatory Agency, told the BBC.

Public health officials elsewhere are watching Britain’s rollout as they prepare for the unprecedented task of vaccinating billions of people to end a pandemic that has killed more than 1.5 million. While the U.K. has a well-developed infrastructure for delivering vaccines, it is geared to administer them to groups such as school children or pregnant women, not the whole population.

The U.K. is getting a head start on the project after British regulators on December 2 gave emergency authorization to the vaccine produced by U.S. drugmaker Pfizer and Germany’s BioNTech. U.S. and European Union authorities are also reviewing the vaccine, alongside rival products developed by U.S. biotechnology company Moderna, and a collaboration between Oxford University and drugmaker AstraZeneca.

The first shipments of the Pfizer-BioNTech vaccine were delivered to a selected group of U.K. hospitals on Sunday.

At one of those facilities, Croydon University Hospital, south of London, staff members couldn’t so much as touch the vials, but they were thrilled to just have them in the building.

“I’m so proud,” said Louise Coughlan, joint chief pharmacist at Croydon Health Services NHS Trust.

The vaccine can’t arrive soon enough for the U.K., which has more than 61,000 COVID-19 related deaths — more than any other country has reported in Europe. The U.K. has more than 1.7 million cases.

The 800,000 doses are only a fraction of what is needed. The government is targeting more than 25 million people, or about 40% of the population, in the first phase of its vaccination program, which gives first priority to those who are highest risk from the disease.

After those over 80 and nursing home workers, the program will be expanded as the supply increases, with the vaccine offered roughly on the basis of age groups, starting with the oldest people.-AP

The Vaccination Centre at the Royal Free Hospital in London, on Monday December 7, 2020.

UK to give first 800,000 doses of coronavirus jab to people over 80 years