UK-based team finds antibodies peaked higher after fourth jab given after gap of more than six months than after third
A fourth dose of a Covid vaccine can ramp up the body’s immune defences beyond the peak achieved after a third dose, research suggests.
A second booster – often a fourth dose of a Covid vaccine – is currently offered in the UK to those aged 75 or over, people living in care homes for older people, and those over the age of 12 who are immunosuppressed.
