More than two million people have been given the coronavirus booster jab in England so far, writes The Guardian.
Booster jabs are being given at least six months after a second dose.
NHS England said on Saturday that three weeks after the booster programme began, a total of 2.08m top-ups have been administered.
It said these include third jabs given as boosters, and doses given to those people with severely weakened immune systems who might not have mounted a strong response to their initial jabs.
Ruth May, the chief nursing officer for England, said she had had her booster recently “to protect myself and those around me”.