People will be able to get a covid booster vaccine on Christmas Day, as part of increased NHS England efforts to top up protection against the Omicron variant.
The roll-out will carry on during Christmas Eve, Christmas Day and Boxing Day, with around 200,000 appointments for a third dose made available across the country over the festive period.
The health service said its "jingle jab" campaign will see NHS staff and volunteers administer doses at scores of local vaccination sites including town halls and local pharmacies.
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NHS England advises booking in advance but said there will be options available for people without appointments across the country.
Experts have warned that while a first or second dose can help, only boosters provide the maximum level of protection against Omicron.
Dr Emily Lawson, head of the NHS covid vaccination programme, said: "We've seen record after record broken in the run-up to the festive season and I want to thank every NHS staff member and volunteer whose goodwill and determination to protect their communities will keep the booster rollout going this Christmas weekend.
"This Christmas, before sitting down to your dinner with your family, I would encourage anyone not already boosted to come forward, book an appointment and get the gift of a jab."
The push over the festive period follows a bumper weekend of 1.5 million boosters and a record daily number of 830,000 jabs delivered on Saturday December 18 alone.
Health Secretary Sajid Javid paid tribute to NHS staff and volunteers giving up their time with family and friends to help the booster roll-out over Christmas.
He said: "Thank-you for everything that you've done and everything that you're doing - this Christmas and all year round.
"You continue to be the very best of us - you achieve phenomenal things and I'm proud to call you colleagues."
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