The graphs, released by the Office for National Statistics (ONS), show that 99 per cent of adults in England were estimated to have Covid-fighting antibodies by February 28.

An estimated 96 per cent of children aged 12 to 15 had the protective proteins and around 81 per cent of youngsters between eight and 11.

Covid antibodies are produced by the immune system in response to either natural infection or vaccination and they indicate at least some level of immunity against the disease.

The figures — based on blood samples from 75,000 people — come exactly two years after the UK went into the unprecedented first lockdown.