Until recently, the UK government limited a fourth dose of the COVID vaccine to people with severely weakened immune systems over the age of 16.
But, following a resurgence of COVID cases in the UK, the government has followed some other countries such as Israel, Germany and Sweden, and expanded the eligibility for a second booster shot. People aged 12 and over who have a weakened immune system, care home residents and people aged 75 and over are now eligible.
