The latest figures reveal that 96.5% of over 50s in Milton Keynes have had at least one dose of the COVID-19 vaccine.
This is a 3.5% increase within that age group compared to last week when it stood at 93%.
A further 11,745 jabs were administered in the past week alone, taking the city's total number of vaccinations to 140,638.
24,069 people in Milton Keynes are now fully vaccinated against the virus.
Currently, the Oxford AstraZeneca and Pfizer-BioNTech vaccines are being administered in Milton Keynes, with the Moderna vaccine only being used in Wales.
The Government has said that in the future Britons aged 18-29 will be offered an alternative to the Oxford-AstraZeneca vaccine after 79 people developed blood clots within days of getting the jab.
More than 20 million people have been given the Oxford vaccine.
Of those who have developed blood clots, 19 have died - three under the age of 30.
A total of 51 women and 28 men aged 18 to 79 were affected, but Professor Sir Munir Pirmohamed, chair of the commission on human medicines, said there is no evidence women have a predilection to develop blood clots after having the Oxford jab.
"The risk is four people in a million," Dr Raine added.
People are being encouraged to get the vaccine when they are offered it, with officials insisting that it is safe.
The vaccine is breaking the link between cases & deaths.— Matt Hancock (@MattHancock) April 8, 2021
We have a system that we are extremely careful on.
When you get the call, get the jab. pic.twitter.com/kmRwedc3d7
England's deputy chief medical officer Professor Jonathan Van-Tam said the new advice is a "course correction" for the UK's "very successful" vaccine rollout - and said for most age groups the "benefits outweigh the risks".