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A health care worker at the Posta Central Hospital in Santiago, Chile, prepares a dose of the Pfizer/BioNtech COVID-19 vaccine Dec. 24 amid the coronavirus pandemic. (CNS/Reuters/Ivan Alvarado)
A health care worker at the Posta Central Hospital in Santiago, Chile, prepares a dose of the Pfizer/BioNtech COVID-19 vaccine Dec. 24 amid the coronavirus pandemic. (CNS/Reuters/Ivan Alvarado)