A fourth dose of Pfizer or Moderna's Covid jabs provide a “substantial” boost to immunity against the virus, UK Government-funded research shows.
The study of around 160 Brits aged 50-80 found the quadruple-vaccinated had up to seven times more T cells, a defensive white blood cell, and two times more antibodies 'over and above' triple-jabbed people.
However, the research also revealed that people who had high levels of antibodies and T cells before they were given a fourth dose only got a small boost to immunity.
