Bedfordshire, Luton and Milton Keynes (BLMK CCG) outlined its focus for the month of April will be administering second doses.
The latest figures from the NHS revealed over 90% of people in Milton Keynes' CCG aged over 50 have received a vaccination protecting against Covid.
The latest data showed of over 140,000 jabs administered in Milton Keynes, 24,096 were second doses only, meaning there is still work to be done to fully protect the most vulnerable groups.
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Meaning focus can return to second jabs administered 12 weeks after someone is initially protected.
The CCG is encouraging all those in cohorts 1 – 9, which covers everybody aged over 50, people who are clinically extremely vulnerable and health and social care workers to book their appointment as soon as possible.
A spokesperson stated: "There are still vaccinations available for those people who have not yet come forward. It is vital that as many people as possible are vaccinated in order to give the widest protection."
Over 45s can now book appointments for their first dose, with the CCG confirming it's sending invitations to this age group this week.
Booking can be made by calling 119 or visiting the NHS website here.
The spokesperson added: "If you already have an appointment over the coming weeks for your second dose, this remains in place and it’s important that you attend it as planned."