England and Wales saw partial bounce backs from 2020 levels in 2021, while life expectancy in Scotland and Northern Ireland remained at the same 'depressed level' as 2020.
The researchers said"life expectancy losses" during flu epidemics in the second half of the last century were"much smaller and less widespread" than those recorded in the COVID pandemic.
Eastern Europe and the US witnessed"worsening or compounded losses" in life expectancy over the same period.
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