A dose of a Pfizer COVID-19 vaccine is prepared at Lurie Children's hospital, Nov. 5, 2021, in Chicago. The omicron-fueled surge that is sending COVID-19 cases rocketing in the U.S. is putting children in the hospital in close to record numbers, and experts lament that most of the youngsters are not vaccinated. (AP Photo/Nam Y. Huh, File)
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