More than 28 million extra years of life were lost among 31 high- and upper-middle–income countries, and 33 nations saw declines in life expectancy, amid the COVID-19 pandemic in 2020, concludes a study yesterday in BMJ.A team led by University of Oxford investigators conducted a time-series analysis of all-cause death data from the Human Mortality Database for 2005 to 2020 to estimate excess years of life lost and changes in life expectancy associated with the pandemic among 37 countries with reliable death data.Decreases in life expectancy were estimated as the difference between expected and observed life expectancy using the Lee-Carter model, and excess years of life lost were estimated using the difference between the observed and