When the C.D.C. published the first significant data on the effectiveness of boosters in adults younger than 65 two weeks ago, it left out the numbers for a huge portion of that population: 18- to 49-year-olds, the group least likely to benefit from extra shots, because the first two doses already left them well-protected.
US is not only the worst country from a death/cases standpoint, but also its governmental health services are not adept to the task.
US is a failed state in many domains outside defense & security.