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 Empty Pfizer-BioNTech coronavirus disease (COVID-19) vaccine vials for children aged 5-11 are seen in Collegeville, Pennsylvania, US, November 6, 2021. (photo credit: REUTERS/HANNAH BEIER)
Empty Pfizer-BioNTech coronavirus disease (COVID-19) vaccine vials for children aged 5-11 are seen in Collegeville, Pennsylvania, US, November 6, 2021.
(photo credit: REUTERS/HANNAH BEIER)

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