SNIP But even in the shadow of this triumph, a more specific crisis in vaccine acceptance has emerged. Americans aren’t now suspicious of inoculations on the whole—the nation isn’t anti-vax—but we have lost faith in yearly COVID shots. Barely any children have been getting them. Among adults, the drop in uptake has been rapid and relentless: By the spring of 2022, 56 percent of all adults had received their initial booster shot; a year later, just 28 percent were up to date; so far this COVID season, just 19 percent can say the same.