Almost 80 per cent of 16 to 24 year olds already have Covid-fighting antibodies, official figures suggested today. England's largest surveillance study estimated the high levels after testing blood samples of more than 1,000 youngsters in the week ending July 18. Almost 60 per cent of 16-17 year olds had signs of immunity... ...The antibody data, released by the Office for National Statistics (ONS), also found almost 94 per cent of people in England now had Covid antibodies. Scientists called the findings 'highly reassuring' and claimed it was 'no wonder' the country was seeing a fall in Covid cases. ......