Though it's sometimes uncomfortable to say it, the risk of mortality from Covid has been dramatically skewed by age throughout the pandemic. The earliest reports of Covid deaths from China sketched a pattern quickly confirmed everywhere in the world: In an immunologically nave population, the oldest were several thousand times more at risk of dying from infection than the youngest. Today Americans 65 and over account for 90 percent of new Covid deaths, an especially large share given that 94 percent of American seniors are vaccinated. Yet these facts seem to contradict stories we've told about what drives vulnerability to Covid-19. In January, Joe Biden warned that the illness and death threatened by the Omicron variant represented a pandemic of the unvaccinated." Over the months that followed, the unvaccinated share of mortality fell even further, to 38 percent in May 2022. The share of deaths among people vaccinated and boosted grew significantly as well, from 12 percent in January 2022 to 36 percent in April. Throughout the duration of the summer ... about as many boosted Americans were dying as the unvaccinated. The share of deaths among older adults kept growing: In April, 79 percent of American deaths were among those 65 and older. In November, 90 percent. If it was ever comfortable to say that the unconscionable levels of American deaths were a pandemic of the unvaccinated, it is surely now accurate to describe the ongoing toll as a pandemic of the old.