HUNDREDS of thousands of over-75s and people with weak immune systems can book a fourth Covid jab from today.
They will get texts and letters from the NHS as it opens the online appointments system.
Older adults in care homes will be visited by NHS teams who will give jabs — as long as it has been six months since their last one.
Five million in total will receive either the Pfizer or Moderna jab this spring.
The over-50s are expected to be offered another top-up this year, probably in the autumn.
Health Secretary Sajid Javid said: “Our phenomenal vaccination programme has saved countless lives and built a wall of defence which has allowed us to learn to live with Covid.”
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NHS chief executive Amanda Pritchard added: “We have protected millions of people at speed thanks to the efforts of our staff, aided by volunteers.
“They will once again rise to the next challenge.”
Ms Pritchard stressed: “There is no need to contact the NHS — when you are eligible for your spring boost, we will be in touch so you can book your appointment at one of hundreds of vaccination sites.”
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The UK Health Security Agency estimates since December 157,000 hospitalisations have been prevented by boosters.
But Covid cases are up 38 per cent week on week with half a million people catching the virus in the past seven days.
