While coronavirus cases are decreasing or plateauing in younger age groups, prevalence has increased in the oldest groups - those more likely to suffer from severe illness.
Please use Chrome browser for a more accessible video playerThe study also suggests that hospital admissions in England have gone up and may continue to rise due to"high and increasing prevalence in older adults".
Professor Christl Donnelly, from Imperial College London, said:"It's still the case that if you see more infection, you would expect, even if it's a very small proportion of those, to see more of the severe outcomes. "So we don't yet know when we'll see a peak in the oldest age group and because those people are at higher risk of severe outcomes that is a particular worry.
"It is possible if the prevalence continues to go up, that you will see further increases in the severe outcome rates."COVID 'could continue to evolve'government continued with plans to drop restrictions, including rules on regular, free testingProfessor Paul Elliott, director of the React-1 programme, said it is"really important" there is ongoing surveillance to monitor severe outcomes from COVID and to track new variants.
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