Every adult in Britain will have been offered a coronavirus vaccination by the autumn, Health Secretary Matt Hancock said Sunday, in the UK's biggest ever inoculation campaign.
Hancock said public health officials are currently vaccinating 200,000 people daily, as they race to meet a target of inoculating 15 million of the most vulnerable by mid-February.
The government is initially prioritising the elderly, their carers and health workers, but the health secretary insisted everybody eligible would be offered the jab this year.
"We are going to have enough to offer the vaccine to everyone over the age of 18 by the autumn," Hancock told the BBC, adding it was vital to have started with the most vulnerable.
British health regulators have so far approved two vaccines -- the Pfizer/BioNTech and Oxford/AstraZeneca jabs -- which are already being administered.
This week they also approved US firm Moderna's inoculation, and it will be rolled out from the spring.
Jabs have mostly been administered at hospitals and doctors surgeries, but seven mass vaccination centres will open next week, with more in the pipeline, according to Hancock.
"The rate-limiting factor at the moment is supply, but that's increasing," he told Sky News.
"We're making significant progress, but there's still further expansion to go."
The vaccination drive is ramping up as a coronavirus variant has pushed infections and deaths to unprecedented levels.
'No clear strategy'
Britain on Saturday passed the grim milestone of three million cases during the pandemic, and announced Sunday another 54,940 new cases.
It also recorded another 563 fatalities from the virus, taking the total death toll to 81,431 -- the highest in Europe alongside Italy.
Prime Minister Boris Johnson imposed a third national lockdown for England at the start of the week, with similar levels of restrictions in place in Scotland, Wales and Northern Ireland.
Medical chiefs across the UK are racing to boost treatment capacity as hospitals risked being overwhelmed, while the government has launched a fresh publicity drive urging people to stay at home.
"Of course we are all tired of restrictions, but we must find the collective strength to get through this critical stage and save as many lives as we can," England's Chief Medical Officer Chris Whitty wrote in The Sunday Times.
However, some public health experts continue to criticise the government's pandemic response.
"The UK has no clear strategy beyond reactive lockdowns whenever hospitals are under pressure," Devi Sridhar, head of global public health at Edinburgh University, told Times Radio.
She urged ministers to learn from other countries, namely those in east Asia and the Pacific, which are "largely back to normal".
Sridhar also cautioned against an overreliance on vaccines alone to end the restrictions.
"It's not a strategy in and of itself and relying on it alone is highly, highly risky, especially with all the new variants and mutations.
"We need to have a plan and the vaccine supports that plan."