My understanding is that the life expectancy in a given year is how long the average newborn would live if the by-age mortality was the same every year was the

My understanding is that the life expectancy in a given year is how long the average newborn would live if the by-age mortality was the same every year was the same as this year for every age. Or in other words, if we had a pandemic like this going on all the time, life expectancy would drop by rather more than the 0.5% IFR.