It is believed that the program will be available to people over the age of 50 who initially received the AstraZeneca vaccine.
They will be offered a Pfizer vaccine booster in the fall, because Pfizer’s vaccine has been shown to be more effective in fighting the Delta variant, according to the Times.
The recall program will begin in September and 23 million people, including those over 50, those at risk and NHS and nursing home staff, are expected to be offered the extra jab.
A senior government source told The Times that those who had previously received the AstraZeneca vaccine “would receive an mRNA boost.”
The Pfizer and Moderna vaccines both use mRNA to protect patients against the coronavirus. The mRNA allows the human body to make proteins from the virus, then allowing it to create its own immune response to Covid-19.
However, the AstraZeneca vaccine does not use mRNA and is instead made from a modified version of the cold virus.
The government has stated that the Pfizer vaccine is 96% effective against the Delta variant while the AstraZeneca vaccine is 92% effective.
It has also been found that mixing doses of different vaccines can improve a patient’s chances of not getting the coronavirus. However, the government has indicated that it does not, at this stage, intend to offer patients different vaccines.