The CDC has struggled to measure and decide who is fully vaccinated against COVID-19. Most recently, it includes people who have received the 2023/2024 updates from Pfizer-BioNTech, Moderna, or Novavax. Dosage rules vary by age. With this as their yardstick, 33% of Americans qualify as vaccinated as of December 10, the latest period for which data are available. Arizona has a rate that is only about half of that. Medical experts have become alarmed that a new variant has spread quickly in the US. The JN. 1 Omnicro sub-variant accounts for over 40% of cases. The WHO describes it as...