Adults under 50 in England have just over a week left to take up the NHS offer of a Covid booster jab.
It is the last opportunity for healthy 16-49-year-olds to get a top-up dose - if they have not yet had three jabs.
The vaccine can help protect against severe illness, even if you have caught Covid before.
Appointments are available at thousands of different sites, including GP practices and high street pharmacies, up to and including Sunday 12 February.
Anyone aged 16 or over - or an at-risk child aged 12 to 15 - who has had both primary jabs, qualify for this booster, which has been available for more than a year.
- In Wales: Over-16s will be invited for their booster. If you haven't been invited - or you haven't had your first two doses - you can contact your health board. You can change or cancel existing appointments online
- In Northern Ireland: All doses can be booked online or by calling 0300 200 7813
Which vaccine will people get?
The NHS is using Moderna's "bivalent" vaccine, which covers both the original Covid virus and the Omicron variant.
It also approved a second bivalent vaccine from Pfizer.
Health officials advise people to take whichever booster they are offered, as all vaccines provide protection against becoming severely ill from Covid.
First and second vaccine doses are either AstraZeneca or (for under-40s) Pfizer or Moderna.