The jabs are being delivered to sites across the country today.
GPs in England are starting the mass rollout of the Oxford/AstraZeneca Covid-19 vaccine as hospitals across the UK face rising numbers of seriously ill patients.
The jabs are being delivered to sites across the country as the Government commits to offering a vaccine to more than 13 million people in the top four priority groups by mid-February.
It comes as NHS trusts in London are on the verge of being overwhelmed, according to leaked health service documents, while other trusts are rapidly turning normal wards into intensive care units (ICUs).
As of January 4, there were 30,451 people in UK hospitals with coronavirus, much higher than the April 12 peak of 21,684.
It's hoped that around 1,000 sites will be delivering vaccines by the end of the week.
The Oxford vaccine can be stored at normal fridge temperatures, unlike the Pfizer jab which requires storage at minus 70C.
Seven mass-vaccination centres will also open next week in London, Newcastle, Manchester, Birmingham, Bristol, Surrey and Stevenage.