You're probably not in Scotland, but yesterday NHS Borders updated their boosters info for those 75 and over. Link:
http://www.nhsborders.scot.nhs.uk/patients-and-visitors/covid-19-vaccination-programme/Second boosters for at-risk groupsWe will soon begin inviting those aged 75 and over and those at highest risk of severe Covid-19 disease forward for their second booster vaccination.
People in the following groups will receive blue envelopes with appointment details:
* adults aged 75 years and over
* individuals aged 12 years and over who are immunosuppressed
These people will be invited as they become eligible from
at least 24 weeks after their last booster, with the first groups receiving appointments from 31 March.
Our vaccination teams will begin vaccinating residents in care homes for older adults from 16 March 2022.