People are tested for COVID-19, at a walk-up testing site run by Nomi Health, Tuesday, Dec. 28, 2021, in downtown Miami. More than a year after the vaccine was rolled out, new cases of COVID-19 in the U.S. have soared to the highest level on record at over 265,000 per day on average, a surge driven largely by the highly contagious omicron variant. (AP Photo/Rebecca Blackwell, File)
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