People in Renfrewshire who are at the highest risk of Covid-19 will be invited for their second booster vaccination in the coming weeks.
Health bosses in NHS Greater Glasgow and Clyde will be offering the jab to residents in care homes for older adults and those in the community who are over 75.
People aged 12 and over who are immuno-compromised and are at the highest risk of the virus will also be sent letters in the mail.